Movement of materials in and out of the cell Practice exercise 1

During a class experiment, Mary placed a cube of sugar in water and left it. Later, she found sugar evenly spread in the water. What process caused this and how is it similar to what happens in living cells?  (2 marks)

During a class experiment, Mary placed a cube of sugar in water and left it. Later, she found sugar evenly spread in the water. What process caused this and how is it similar to what happens in living cells?  (2 marks)

During a class experiment, Mary placed a cube of sugar in water and left it. Later, she found sugar evenly spread in the water. What process caused this and how is it similar to what happens in living cells?  (2 marks)

During a class experiment, Mary placed a cube of sugar in water and left it. Later, she found sugar evenly spread in the water. What process caused this and how is it similar to what happens in living cells?  (2 marks)

During a class experiment, Mary placed a cube of sugar in water and left it. Later, she found sugar evenly spread in the water. What process caused this and how is it similar to what happens in living cells?  (2 marks)

After fasting for two days, a student in Baringo begins to feel weak and dizzy. Explain how diffusion continues to operate in their body and why it remains important to living things even without food intake.  (2 marks)

After fasting for two days, a student in Baringo begins to feel weak and dizzy. Explain how diffusion continues to operate in their body and why it remains important to living things even without food intake.  (2 marks)

After fasting for two days, a student in Baringo begins to feel weak and dizzy. Explain how diffusion continues to operate in their body and why it remains important to living things even without food intake.  (2 marks)

At a sports event in Nyahururu, an athlete collapses and is given oxygen. Explain how diffusion is involved and why this is important to living things using the image below.   (2 marks)

At a sports event in Nyahururu, an athlete collapses and is given oxygen. Explain how diffusion is involved and why this is important to living things using the image below.   (2 marks)

At a sports event in Nyahururu, an athlete collapses and is given oxygen. Explain how diffusion is involved and why this is important to living things.   (2 marks)

At a sports event in Nyahururu, an athlete collapses and is given oxygen. Explain how diffusion is involved and why this is important to living things.   (2 marks)

A student puts sugar in water and sees it spread on its own. Later, the same student places a slice of potato in plain water and it swells. Explain the two processes taking place and give one difference between them. (2 marks)

A student puts sugar in water and sees it spread on its own. Later, the same student places a slice of potato in plain water and it swells. Explain the two processes taking place and give one difference between them. (2 marks)

A doctor tells a patient with diabetes that sugar levels in the blood are high and are not entering the body cells properly. Explain how this relates to diffusion.  (1 mark)

A doctor tells a patient with diabetes that sugar levels in the blood are high and are not entering the body cells properly. Explain how this relates to diffusion.  (1 mark)

Melissa was making a drink and put just one tiny drop of bright red food coloring into a clear glass of still water. She noticed that even without stirring, after a little while, the whole glass of water turned light pink. Explain why the red color spread out all by itself.  (2 marks)

Melissa was making a drink and put just one tiny drop of bright red food coloring into a clear glass of still water. She noticed that even without stirring, after a little while, the whole glass of water turned light pink. Explain why the red color spread out all by itself.  (2 marks)

A child with diarrhea is given oral rehydration solution (ORS). Explain how osmosis helps the child feel better.  (1 mark)

A child with diarrhea is given oral rehydration solution (ORS). Explain how osmosis helps the child feel better.  (1 mark)

A child with diarrhea is given oral rehydration solution (ORS). Explain how osmosis helps the child feel better.  (1 mark)

A child with diarrhea is given oral rehydration solution (ORS). Explain how osmosis helps the child feel better.  (1 mark)

While jogging early in the morning in Kisumu, a student notices they breathe faster. Explain how diffusion helps in this process and why it is important in living things.  (2 marks)

While jogging early in the morning in Kisumu, a student notices they breathe faster. Explain how diffusion helps in this process and why it is important in living things.  (2 marks)

The diagram below shows water moving from the soil into a root hair cell. Explain the process shown and describe its importance to the plant’s survival. (2 marks)

The diagram below shows water moving from the soil into a root hair cell. Explain the process shown and describe its importance to the plant’s survival. (2 marks)

The diagram below shows water moving from the soil into a root hair cell. Explain the process shown and describe its importance to the plant’s survival. (2 marks)

Two students are discussing the difference between osmosis and diffusion. One says both processes are the same because particles move from high to low concentration. Use examples and at least two differences to explain why the student is wrong.  (3 marks)

Two students are discussing the difference between osmosis and diffusion. One says both processes are the same because particles move from high to low concentration. Use examples and at least two differences to explain why the student is wrong.  (3 marks)

Two students are discussing the difference between osmosis and diffusion. One says both processes are the same because particles move from high to low concentration. Use examples and at least two differences to explain why the student is wrong.  (3 marks)

Study the image below of a glass of water with a tea bag inside. Explain why the colour from the tea bag spreads and what this shows about movement of materials in living things.  (2 marks)

Study the image below of a glass of water with a tea bag inside. Explain why the colour from the tea bag spreads and what this shows about movement of materials in living things.  (2 marks)

Study the image below of a glass of water with a tea bag inside. Explain why the colour from the tea bag spreads and what this shows about movement of materials in living things.  (1 mark)

The diagram below shows a root hair cell in contact with water in the soil. What process is being shown in the diagram? Explain how it helps the plant. (2 marks)

The diagram below shows a root hair cell in contact with water in the soil. What process is being shown in the diagram? Explain how it helps the plant. (2 marks)

The diagram below shows a root hair cell in contact with water in the soil. What process is being shown in the diagram? (1 mark)

The diagram below shows a root hair cell in contact with water in the soil. What process is being shown in the diagram? (1 mark)

Explain what a semi-permeable membrane is and its role in osmosis. (2 marks)

Explain what is a semi-permeable membrane . (1 mark)

Explain what is a semi-permeable membrane . (1 mark)

Explain what is a semi-permeable membrane . (1 mark)

The image below shows an amoeba living in water. Explain how diffusion helps the amoeba to get rid of waste substances. (1 mark)

The image below shows an amoeba living in water. Explain how diffusion helps the amoeba to get rid of waste substances. (1 mark)

The image below shows an amoeba living in water. Explain how diffusion helps the amoeba to get rid of waste substances. (1 mark)

The image below shows an amoeba living in water. Explain how diffusion helps the amoeba to get rid of waste substances. (1 mark)

A slice of bread is kept inside a tightly closed plastic bag. After a few days, the inside of the bag has a strong smell. Use the concept of diffusion to explain how this happened.  (2 marks)

A slice of bread is kept inside a tightly closed plastic bag. After a few days, the inside of the bag has a strong smell. Use the concept of diffusion to explain how this happened.  (2 marks)

A slice of bread is kept inside a tightly closed plastic bag. After a few days, the inside of the bag has a strong smell. Use the concept of diffusion to explain how this happened.  (2 marks)

A mountain climber drinks a lot of plain water without eating salty food. Later, she starts feeling dizzy. Explain how osmosis may have caused this reaction in her body.  (2 marks)

A mountain climber drinks a lot of plain water without eating salty food. Later, she starts feeling dizzy. Explain how osmosis may have caused this reaction in her body.  (2 marks)

A mountain climber drinks a lot of plain water without eating salty food. Later, she starts feeling dizzy. Explain how osmosis may have caused this reaction in her body.  (2 marks)

A mountain climber drinks a lot of plain water without eating salty food. Later, she starts feeling dizzy. Explain how osmosis may have caused this reaction in her body.  (2 marks)