The First Nine Months

Baby: the first nine months
1. When Does a baby:
a)begin to move - in 10 weeks
b)open its eyes - in 26 weeks
c)begin to kick its mother so that she notices - in 18 weeks
2. When is the baby:
a)as long as a finger nail - in about 1 and a half weeks
b)as long as your foot? - in about week 18-20
3. Babies which are born early are kept warm in incubators. Why?
Because the fat to keep babies warm are made in week 34, just a bit before its supposed to be born, so if it's born early it won't have that fat to keep the baby warm.
4. We don't have to do
5. Try to find our: why girls should be given injections to prevent them from getting German measles
Because it will prevent them from getting German measles, because German measles are a disease running in blood of women.

Growing up: non-human animals
1. Which two thing do all the growing embryos need?
- oxygen
- food
2. How does:
a) A frog embryo - Oxygen just diffuses in from the air and water around
b) A human embryo - Oxygen comes from the mothers blood
get the oxygen it needs?
3.a) What is the yolk's job in the egg?
The yolk in the eggs give the embryos all the food it needs.
3.b) As the chicken grows, the egg's yolk gets smaller. Why?
Because the chicken eats the yolk
4. Make lists of animals which grow:
a) Inside the mother
- Mammals e.g dolphins
- Humans
b) Inside eggs which the mother lays
- insects
- amphibians
- birds
- reptiles
5. Which animals produce embryos that grow into larvae?
caterpillars, maggots, and tadpoles
6. Try to find our: how lizard embryos grow.
They grow in eggs

Agenda 15/06/2010

- Watch the miracle of life on development
- Homework Questions on Development
Due Tomorrow

Agenda 09/06/2010

- Learn how our cells are made/learn how our sex cells are made
- Learn how our genes are passed to the next generations

Agenda 07/06/2010

- Pass Back Tests
- Pass Back Homework
- Go Over Seeds and How Plants Grow

Agenda 03/06/2010

- Turn in Homework
- Do Flower Dissections
Fruit

Agenda 02/06/2010

- Go on aphid hunt by going out and collecting and examining the sexual organs of flowers
- Take notes on the structure of flowers
- Do flower lab/Do not lose

Agenda 01/06/2010

- Finish taking notes
- Read Wikipedia -> Aphids
- Read Wikipedia -> Angler Fish
- Watch Videos on Sexual vs. Asexual Reproduction
- Go Collect Aphids

Agenda 31/05/2010

- Pass back and talk about one world
- Take notes + Review on characteristics of Life and Reproduction

Goal: Understand the different between Asexual + Sexual Reproduction

Agenda 27/05/2010

- Had Sound, Sight, and Light Test

Agenda 26/05/2010

- Review for the Test Tomorrow

Agenda 25/05/2010

- Finish up the unit on hearing + Balance
- The Structure of the Ear
- Test our Hearing
- Pass out Review sheet fo the test

Agenda 24/05/2010

- Did One World for Problems of the eye

Agenda 19/05/2010

- Review Sound by:
Filling out the sound packet
- Go over the sound packet
- One period to work on the one world

Agenda 18/05/2010

- Discuss when to do one world write up
- Work on One world

Agenda 17/05/2010

- Start One World
- Tuesday One world
- Wednesday 2nd Period
Write up One World

Test Next Thursday May 27th

Agenda 06/05/2010

- Review
- Finish Filling out eye Worksheets
- Pass back labs
- If we finish, Heads up 7 up

Brainpop Video: Refraction and Diffraction

Brainpop Video: Light

There are two different types of light Natural lights, like the sun or even some animals which can make light from chemical reactions, and artificial lights, and there are two ways to make this type of light; by heating something to make it lit up light like candles or running an electric current through a solid like light bulb filament, and gas(neon). Artificial light is caused when matter shows energy in the form of light rays. We can also see thanks to light, light hits visible things and bounces off, this gets reflected into our eyes, which is how we see. As I said from the video summary before, light can travel through empty space. Light compared to anything or anyone travels fast, as fast as 300million meters in one second. Light can be reflected to bounce off and travel another way, but always straight, although light doesn't always exactly travel straight. Because when light travels through a transparent matter it bends/refracts but when the light is out of that "boundary" it heads straight again, this happens because light travels in different speeds, light travels slower therefore the line of rays bend. But, one like lightening is a electrical effect, which releases lot's of energy as a form of light.

Sound Experiment

1. How does the length of the tuning fork affect its pitch?
The longer the tuning fork the deeper the sound gets, so the shorter the tuning fork the higher the pitch of the sound.

2. How does soiund travel through solids, liquids, and gases?
Sound travels faster through solids and liquids, and through gases it travels slower.

Optical Illusion Experiment Summary

In this experiment about optical illusions, we put a see through glass in front of us, and put the real flame on one side, and on the other a person would be standing. We would move the person or the bunsen burner to make it look like the person was holding or blowing fire.

How does the distance in front of a mirror affect the distance it appears to be behind the mirror?
The distance of the object in front of the mirror is the same as it appears to be on the mirror.
So it would look something like this:
(the left is the real and the right is a illusion)

Agenda 05/05/2010

- Show People your blogs and discuss
- Fill out light packet together (Review transverse vs compression wave)
- Do sound experiments
How does sound travel through a vacuum, gas(air), solid, liquid
How does the length of a tuning fork affect its pitch?

Agenda 04/05/2010

- Finish discussing optical illusions
- Figure out Frames per second that is required, For the car in the garage
- Finish updating your blog

Brainpop Video: Waves

The video on waves in brainpop is about the two different types of waves electromagnetic and mechanical waves, which includes sound waves, light waves, and ocean waves. The difference between the two types is that mechanical waves need a medium (any kind of matter that's disturbed by energy) to move through whereas the electromagnetic waves don't, they can travel through empty space. But they also have a similarity, that both of the types send transfer energy from one place to another. Mechanical waves looks like it moves matter with them, but they don't, they go back to it's original place after its disturbance of waves, when its energy is passed on to another figure. Like I said before, electromagnetic waves travel through completely empty space, that is how we get light from the sun to earth. These two are different but are measured in many similar ways. The highest part of a wave is is called the crest, and the lowest is called the trough. An amplitude is the distance between the middle of the wave and the top of the wave, this tells us how much energy the wave is carrying, the more amplitude the greater the energy, and finally a wavelength is the distance a wave travels in one cycle. Frequency also measures waves. Frequency and Wavelength are related, the higher the frequency the shorter the wavelength. Transverse waves are most electromagnetic waves and ocean waves. But, waves like sound waves are called compressional, matter is moved about in the same way as energy, this forms a series of compressions which vibrate, which is how you hear sound.

Mechanical Waves: Ocean Waves, Seismic waves, Sound waves and Slinky waves.
Electromagnetic Waves: Light waves and Radio Waves

Agenda 03/05/2010

- Talk about optical illusions
- Do optical illusions/take a picture and put it on your blog. Describe how your optical illusions works. Make sure to discuss the distance to a mirror and where its image appears.

Agenda 28/04/2010

- Go over homework questions
- Do demonstrations of different kinds of waves
- Watch brainpop videos on waves, light and refraction, write a paragraph (summary)
- Use ray boxes to show what light does when it goes through lenses

Agenda 26-27/04/2010

We did a lab report

The Behavior of Light

Shadows and Reflections (p.96)

1. What evidence do you have that light travels in straight lines?
Light travels in straight lines by traveling in a wave. Light travels through anything ‘transparent’, fastest through vacuum. (Also, the fact that shadows are right behind the object blocking the sun, proves that light travels in straight lines)

2. In the top right hand drawing, imagine that the lamp represents the sun, the cell represents the moon, and the screen is the earth. Make a drawing to show the places on the earth where you would see a partial eclipse and a total eclipse of the sun.

The picture belows top image is a total eclipse and the bottom image is a partial eclipse




3. When light is reflected in a mirror, what is special about the angle of the incident and reflected rays?
The angle of the incident and reflected rays reflected in a mirror become equal to each other

4. Where is the image when you look at something in a mirror?
The image appears to be behind the mirror, when you look at something in a mirror.

5. Light travels in straight lines. If you hide just round a corner so that you can’t see your friends, can they see you?
Sorry, I couldn’t find a way to answer this question…


Reflections by different surfaces (p. 97)

1. What can you see in a completely dark room?
It’s obvious, you can’t see anything, but, sometimes you can figure out some figures.

2. If you place a lamp in this dark room as a light source, explain how you could now see:
a) The lamp: you could see the lamp in a dark room when the lamp is placed as a light source because it is beams of light
b) A piece of white paper: you can see the paper in a dark room when the lamp is placed because papers surface is rough, due to this, when light ‘hits’ paper with various angles the beams goes to different places, and so light becomes reflected from the paper, but scattered beams, not a single beam, therefore we can see the paper

3. What types of mirror could you use for make-up or shaving? What would be the advantages of each type?
When using concave mirrors, you can see a focus point clearly, the image looks bigger, therefore see all pieces of hair when shaving and see smudges or mistakes in make-up.
And when using convex mirrors, they make your face look smaller, and you can see your face in general to see if an opponent can see if you made mistakes in make-up or shaved properly.

4. If a driver has one convex, and one plane rear-view mirror, how would the images in each appear different?
The convex rear mirror would allow you to see closer to the back, but this may confuse the driver, whereas the plane mirror would just allow you to see the normal image, the same size as the actual object or thing.

5. Why could you not use a concave mirror as a rear-view mirror?
You would not use a concave mirror, because rear-view mirrors are supposed to help you see the rear closely, to make it nearer, but concave mirrors make the image look zoomed out, bigger.

6. List as many different uses as you can for plane, convex and concave mirrors
Plane mirrors basically make you see an object as it is exactly, so it would help you to see yourself how tall, fat, thin, short you are.
Convex mirrors help you see closer, therefore you could use it to look at writing you couldn’t read.
Concave mirrors help you see a bigger view, thus it should let you see a full image in a small space of mirror, or the area you’re in.
(I couldn't think of too many so I put it in this format)

Agenda 22/04/2010

- Review all your past Labs. Put together your portfolio
- Prepare a lab help sheet to get ready for your lab write up on Monday

Agenda 21/04/2010

- Eye testing
- Getting ready for our first lab write up tomorrow

Agenda 20/04/2010

- Quiz on eye
- Disappearing image activity
Homework: Finish up dating your blog

Agenda 19/02/2010

- Check homework
- Discuss Iceland volcano
- Explain how eyes work
- Investigate different types of animal eyes post on blog

Agendas...

My computer had to get re-formatted because it wouldn't turn on, and before I could post them, they got erased... I'm so sorry, I know it was my responsibility. I'll try my best to get all of them from now on at least.

Pinhole Camera Experiment

Sorry sir, I couldn't answer some of the questions because I hadn't tried the experiments, and 1 I think I didn't understand. And it says 15th of April because I typed the Title and made this post then, (But I didn't answer all the questions then ), I just hadn't published it.

Experiment 1
WHAT TO DO
Collect the pin-hole camera and make a small hole with the pin in the black paper. Hold the camera about 3m from the window and look through the camera at the lamp
You should see and image of the lamp on the tracing paper screen. Write down what the window looks like. Is it:
a) Upside down or the right way up? it is upside down
b) In color or black and white? it is black and white
c) The same size as the window itself or not? no it was way smaller

Experiment 2
WHAT TO DO
Change the distance of the pin-hole camera from the window.
How does this affect:
a) The size of the image?
b) How clear the image is?

Experiment 3
WHAT TO DO
Make another pinhole about 1 cm from the first one
Describe what you see below.
Didn't do this.

Experiment 4
WHAT TO DO
Make ONE of the pin-holes bigger using a pencil point.
What affect does it have on:
a) How bright the image is? it gets brighter the bigger the hole is
b) How clear the image is? it gets blurrier the bigger the hole is
b) How big the image is? it gets bigger as the hole gets bigger

Experiment 5
WHAT TO DO
Take off the black paper and stick a lens over the hole in the cardboard, INSIDE the box. Repeat experiments 1 and 2 using the lens. Didn't do this.

Experiment 6
WHAT TO DO
1. Look at the windows through the pin-hole camera especially if it is a sunny day. Didn't try this.
2. Sit someone in the beam of the projector and look at them with the pinhole camera. A: the person sitting was seen on the top of the pinhole camera, the pictures turns upside down when projected
3. Try lenses with different focal lengths (large or small curvatures). Didn't try this.

QUESTIONS
1. Why was the inside of you camera painted black?
2. Why was the light shield used?
3. Why was the image so much better with a lens?

FOLLOW UP TOPICS
1. Try to take an actual photograph with your pin-hole camera
2. Draw ray diagrams to show how the image is formed on the tracing paper screen

How can you improve your MYP grade next term?

I need to get a higher mark on criteria D especially. I did get a seven for term 1 and probably 2 from what I counted in average, and I'm really happy, but I barely made it into the 7 area. So, I think the next criteria D or B I think?, I should try my best to get full marks. This year it counts last term and this terms as well, which is what makes it harder, but also easier. That is because if you get one grade bad it could effect you for the whole year, yet if you normally not get a 6 and you got one in the first term or something, it could higher your grade. So for criteria D i got a 4 and that effected criteria D a lot. What I can do myself, is to try my best, and review daily, so I can remember all information to the fullest. Knowing information helps because at the time of a test or whatever, if I know the information, I can think of a way to use it to support my statements or thoughts.

Agenda: 02/02/2010

• Show petri plates bread mold (discuss lab write up)
• Show where students get information to revise from
• Discuss differences between bacteria and viruses (how they cause diseases)
Homework: practice lab report

Hypothesis for Scientist Dr. Edward Paginilli's Experiment

"My hypothesis is that the tongue has specific regions that only can taste sweet, bitter, sour, and salty."

I agree to this hypothesis because when I did the experiment with the vinegar, sugar, salt, and black coffee, I seemed to taste stronger tastes on the different bits of the tongue for each flavor. Although I couldn’t taste it that well in general for some of the things I could taste, I tasted it more strongly on a certain bit of the tongue, than overall. Even though I did taste it more on the certain places, you could still taste it on other places, I believe there’s not only one particular part that you can taste the sweetness, or saltiness etc. So I believe the hypothesis above is correct but incorrect.

Active Earth Video

Brainpop videos: Erosion and Rock Cycle

Brainpop: Rock cycle

The three rock types, metamorphic, sedimentary, and igneous are all made of magma, lava, mineral grains, and crystals. Metamorphic rocks are made of heat and pressure onto baking rocks, or earth’s plates moving to create metamorphic rocks. Sedimentary rocks are forms above surface usually from erosion. Igneous rocks have two types, extrusive igneous rocks and intrusive igneous rocks. Both are made when magma/lava cools forming rocks, but the formation is different. Extrusive ones’ magma comes onto the earth’s surface (becoming lava) and cools to form rocks. Whereas intrusive rocks forms when magma cools and hardens underground after thousands of years. The rock cycle is like this, metamorphic and sedimentary rocks can be melted and cooled back to igneous rocks, igneous and metamorphic rocks then can be eroded to make sedimentary rocks, finally sedimentary and igneous rocks near heat and pressure can become metamorphic.


Brainpop: Erosion

Erosion is anything that can change the landscape, like when plant roots keep sand and soil together. The first part of erosion is when sand and rocks are picked up and thrown about by glaciers, wind, running water, or waves. Secondly, another part of erosion is weathering. Weathering is when small particles of dirt wear away from rocks. Lastly erosion is also caused by rivers, oceans, and rain, when it carries soil down the water. In these processes the pebbles hit each other constantly, gradually getting smaller. Finally erosion some issues (not necessarily bad) like floodplains, sandbars, and river deltas, or even change the shapes of the continents. But erosion forms some things as well such as beaches.

What is a mineral?

What is a mineral?
Minerals are non-living, solids, and are made up of elements. There are over 3,000-4,000 of them.

How is a mineral different than a rock?
A mineral is different to a rock because minerals are inorganic naturally occurring substances, have a definite range of chemical composition, are solids, and have a crystalline structure but rocks are made up of 2 or more minerals

What are crystals and how are they made?
Crystals are solids that form by a regular repeated pattern of molecules connecting together. In crystals, however, a collection of atoms called the Unit Cell is repeated in exactly the same arrangement over and over throughout the entire material.

What is the relationship between a mineral and a crystal?
The relationship between a mineral and a crystal is that when minerals form into the special shapes we recognize as crystals. This happens when, if minerals are able to form freely in a hole or cavity in the surrounding rock the mineral takes the form of a crystal and these crystals lined cavities are called geodes, vugs or pockets.

How are minerals different from each other?
Minerals are different from each other because minerals are formed in nature. And each of them are chemically different, which makes them have different effects, or do different things.

How are minerals used? What is an ore?
Minerals are useful and used in many ways. Coal, lead, silver, steel, copper, and gold are all minerals and they help us make different things like the telephone, houses, and many other things.
An ore is a type of rock that contains minerals such as gemstones and metals that can be extracted through mining and refined for use.

Immune system and Boogers

Immune system 15/02/2010
Immune system – a system of tissues, cells and organs that help your body fight off diseases and illnesses

The immune system is something that helps protect your body by fighting off diseases and illnesses. Our body has a few systems to help fend off the germs (listed below).
These are immune systems:

• Skin – like a shield that protects your body from pathogens entering
• Mucus – traps many of the pathogens we inhale
• Stomach acids – kill the pathogens that live on the food you eat
• White blood cells (leukocytes) – patrol your body to look for pathogens, and when they find germs they kill it before it makes us sick

Although we have these systems, sometimes if a leukocytes doesn’t recognize a germ it could make us sick. Which is why we use antibiotics and vaccines. We use antibiotics to get rid of bacteria infecting our body, antibiotics do this by attacking the cell wall of bacteria to make it ‘blow up’. But vaccines are more used to destroy viruses, viruses do not have a cell wall, therefore cannot be taken care of antibiotics, and vaccines put dead or weak germs into the body to make the body on alert, then the immune system take care of the rest. Also after the infection is treated the immune system will memorize the infection and are able to treat it easily the next time, an example of one would be chicken pox, most people have it only once in their life, because the immune system remembers it. Basically if you have a antibody for a certain germ you would become protected from it.

Boogers

Boogers are tissues and organs. Boogers in a more scientific said way would be mucus. And one fact I found really interesting but disgusting is that boogers turn green because of the things in the air, and are normally clear, as when you get a runny nose. Running noses happen when you get sick to push out all the bad microbes out of your body. Boogers are one of the immune systems, like I listed above as mucus. Boogers trap microbes in the nose, to prevent microbes from getting in through the nose to infect your body. And they can destroy bacteria from enzymes produced. Boogers aren’t only in your nose though, they are near your lungs, as well, because if you breathe through your nose it goes to your lungs. So mucus is really helpful in protecting the lungs.

The Magic school bus Homework

The magic school bus and the giant germ 20/01/2010

Chapter 1
1. Microbes are small. According to Ms. Frizzle, how many microbes are you stepping on with each foot when you walk across the ground.
According to Ms. Frizzle, you step on billions of microbes.
2. Not all microbes are germs. Explain the difference.
Some microbes can make us sick, some microbes are bad for us and some are good.
3. List one example of a viral germ.
An example of a viral germ is chicken pox
4. List one example of a bacterial germ.
An example of a bacterial germ is strep throat.

Chapter 2
1. There are many beneficial types of microbes. List three types of beneficial microbes and how they are useful to man.
Some beneficial microbes are algae, fungi, and bacteria. Some microbes are the yeast that makes the bread rise, make medicines, and even clean nuclear waste. Microscopic algae’s produce the oxygen we breathe. Fungi’s are used to make cheese. And some bacteria’s are used to make yogurt.
2. Microbes can be made up of one or more cells. Why is it that you can only identify a “forest” of bread mold when each “tree” cannot be seen?
You can see a “forest” and not a “tree” because, only when there’s a lot of bacteria you can see it with the naked eye.
3. List two ways you can slow down the development of microbes on your food.
You can slow down the development of microbes in your food by either putting food in a hot or cold climate.

Chapter 3
1. Compost (food scraps, leaves, etc.) is broken down by bacteria and fungi into a beneficial soil material called humus. What environmental conditions encourage the development of bacterial and fungal microbes?
The development of bacterial and fungal microbes are encouraged from moist of warm environments
2. Which gas and form of energy is released when compost is broken down by microbes?
Carbon dioxide gas and energy is released when compost is broken down by microbes
3. Ms. Frizzle’s students observed ball, spore, and spiral shaped microbes floating in the air. These were all examples of which type of microbe?
The three were all examples of fungi bacteria or enzymes?
4. Explain why some types of bacteria and fungi are used as antibiotics so people can get well.
Some microbes eat other microbes of different kind that make plants and animals sick. Because antibiotics are made from microbes (bacteria and fungi), they kill bacteria that cause diseases to prevent people from getting sick or to make people better.
5. Bacteria and fungi break their food down by using chemicals called enzymes. How does a protozoan consume its food?
A protozoan consumes its food by swallowing it, not having to break it down.

Chapter 4
1. Why is it a good idea to cover food that might be exposed to flies?
The reason why it’s a good idea to cover food that might be exposed to flies is because flies pick up a lot of microbes including ones that make us sick.
2. Describe the cold virus particles that jimmy sneezed out.
They were a lot smaller than other microbes, and look like tiny ping pong balls with spikes all around them, billions came out from jimmy’s mouth.

Chapter 5
1. Bacteria and viruses are both small. Compare the size of each of the two types of microbes.
Viruses can be 20 – 100 times smaller than bacteria
2. What is the one purpose of all viruses?
The one purpose of all viruses is to make more of their selves (to do that they have to invade living cells)
3. Why do viruses make people sick?
Viruses make people sick because when they invade cells to reproduce they damage it, which makes living things sick
4. List three barriers the human body has to protect itself from entry by viruses
• Skin protects germs from getting in.
• Eyelashes, tears, and nasal hairs also protect germs from getting in
• Saliva and mucus make surfaces slippery, which makes it hard for bad microbes to do damage
5. Why when you are tired are you more vulnerable to germs?
Because when you are tired, your cells in your body are also tired, so it doesn’t protect your body too well sometimes.

Chapter 6
1. Why should a person use soap when hand-washing?
A person should uses soap when hand-washing because soap makes everything slippery, so it makes bad microbes unable to stick, which makes them unable to cause any harm
2. List Arnold’s how-to hand-wash guide rules
• Use plenty of soap and warm water
• Wash the palms, fingers, wrists and the back of the hands. Don’t forget to scrub under the fingernails!
• Wash for at least 10-15 seconds. That’s enough times to wash away microbes.
• Rinse!
• Dry your hands on your own towel or on a clean paper towel
3. According to Ms. Frizzle, you should wash your hands before you do the following two things.
You should wash your hand before you:
• Prepare or eat food
• Treat a cut or take care of someone who is sick
4. According to Ms. Frizzle, you should wash your hands after you do the following six things.
You should wash your hands after you:
• Go to the bathroom
• Handle raw meat
• Blow your nose, cough, or sneeze
• Handle garbage
• Are around someone who is sick
• Play with or touch a pet

Chapter 7
1. Yeast, a type of fungus, produces enzymes that break down the natural sugars in bread dough so that it can use it for energy. What gas is released in the process that causes the bread to rise?
The gas carbon dioxide is released in the process that causes the bread to rise
2. List three examples, other than for bread making, where microbial enzymes are useful.
Microbial enzymes are useful because they make:
• Cheese
• Yogurt
• Soy sauce
• Paper
• Laundry detergent
• Bubble gum
• And the stonewashed look on blue jeans
3. Why is a nutritious diet important for good health?
A nutritious diet is important for good health because they help you stay germ free, because good foods give your body energy to fight off bad microbes.
Chapter 8
1. List two types of germs that are attacked by white blood cells.
• Bacteria
• Viruses
2. List two ways that the body changes to fight infection germs.
• Our bodies pump extra blood to the spot, so that more white blood cells come to fight them off
• And our body temperature gets hot, because white blood cells can work faster in hotter temperature
3. What type of germs are antibiotics designed to fight?
(couldn't find)

4. How do white blood cells mark germs for destruction?
White blood cells mark germs for destruction by spraying a cloud of tiny white particles
5. How do antibodies help fight future disease-causing germs?
They keep track of the types of microbes that cause diseases they come across int eh body.
6. Explain how vaccines work against viruses.
Vaccines work against viruses by:
• Weakened germs put into body (those similar to the ones that make us sick although they are harmless)
• Bodies work by itself, to get rid of disease (white blood cells)
• When real bad ones come along, body can kill them off before they make us sick

Chapter 9
1. What did the magic school bus students do before they ate pizza at Paolo’s pizza restaurant?
The magic school bus students stopped to wash their hands with soap before they ate.

Animal and Plant cells homework

Animal Cells:

4. Copy and complete the table below to show the roles of the main structures in an animal cell

• Nucleus: the control centre. it gives information on what type of cell is formed
• Cell membrane: an outer layer that contains the contents of the cell and allows substances to enter and leave the cell
• Cytoplasm: jelly-like liquid where cell activity occurs

5. Do you think the nucleus always has to be in the middle of a cell? Give evidence to support you answer

No I don’t think the nucleus always has to be in the middle, because if you look at actual cells, they never have it exactly in the middle.

6. Explain why an animal cell has an irregular shape and a plant cell has a fixed shape

Because a Plant cell has a cell wall and an animal cell doesn't.

Plant Cells:

3. Which three structures are found in both plants and animals?

Nucleus, Cytoplasm, and cell membranes

4. Which three structures are only found in plant cells?

Cell Walls, Chloroplast, and Cell vacuole

5. In a plant cell what is the role of the:

• Cell wall – a outer layer that keeps the cell still or ‘rigid’
• Chloroplast – a structure that contains a green pigment that traps light
• Cell vacuole – the spaces in the cell that are fluid-filled, which gives it it’s chape

Cells and Bacteria Homework

Cells and cell structures:

Cells are the building blocks of life. All living things are made of cells. Cells live in groups called tissues, and they also have functions like organelles, cytoplasm, lysosomes, peroxysomes, and membranes, membranes lets good stuff in and keeps bad stuff out, like we have organs. Cells have different features and they can look very different, but they all have a DNA which orders them around to do certain things. Plant cells have rigid cell walls that maintains their shape.

Things animal cells don’t have:

• Cell wall
• Chloroplast
• Vacuole

Things both cells have:

• Nucleus
• Plasma membrane

Bacteria:

Bacteria are single-celled microscopic organisms. Makes up Animals, Plants, Fungi, Protists and Archaea. Bacteria is all around us, there are good and bad bacterias. Bacteria also come in lots of different shapes and sizes. Some can’t move and some use tiny hairs and little strands to move. Bacteria’s nuclear material is not surrounded by a membrane. Bacteria doesn’t have many complex organelles like plant and animal cells do, all they have is a nucleoid and ribosomes

What a basic bacteria has:

• DNA
• Nucleus
• Plasma membrane
• Cell wall
• Ribosomes

What basic bacteria’s don’t have compared to plant and animal cells:

• Vacuole
• Chloroplast

And many others, but this is the simplest things on it.