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

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 boy eats fruits during lunch break. Later, he begins running in a school race. Using the image below showing body cells, explain how diffusion helps his body use the food energy.  (2 marks)

A boy eats fruits during lunch break. Later, he begins running in a school race. Using the image below showing body cells, explain how diffusion helps his body use the food energy.  (2 marks)

After running, a person breathes heavily to take in more oxygen. How does oxygen move from the lungs into the blood? (1 mark)

After running, a person breathes heavily to take in more oxygen. How does oxygen move from the lungs into the blood? (1 mark)

Jane swallowed a pain relief tablet after getting a headache. After a few minutes, she felt better. How does diffusion help the medicine to work?  (1 mark)

Jane swallowed a pain relief tablet after getting a headache. After a few minutes, she felt better. How does diffusion help the medicine to work?  (1 mark)

Jane swallowed a pain relief tablet after getting a headache. After a few minutes, she felt better. How does diffusion help the medicine to work?  (1 mark)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain how osmosis affects animal cells in such conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain how osmosis affects animal cells in such conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

The diagram below shows two animal cells. Cell A is placed in pure water, and Cell B is in a concentrated sugar solution. Describe what happens to each cell and explain the importance of osmosis in these conditions. (2 marks)

During an experiment, a learner places dried grapes in water and also sprays air freshener in a room. What similarity do both activities demonstrate about particle movement? Support your answer with a reason. (2 marks)

Observe the image below. What concept is being demonstrated?

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places slices of raw potato in a bowl containing coloured water. After a while, the potato pieces begin to change colour. What concept is being demonstrated in this real-life setup?  (1 mark)

A student places two bags into water: one with starch and one with glucose. Later, only glucose is found in the water. Why?

A student places two bags into water: one with starch and one with glucose. Later, only glucose is found in the water. Why? (1 mark)

A student places two bags into water: one with starch and one with glucose. Later, only glucose is found in the water. Why? (1 mark)

Why do mango slices become soft when stored in concentrated sugar solution for a long time?

A fruit vendor stores mango slices in a concentrated sugar solution to preserve them. After several hours, the mango slices become soft and shriveled. What is the most likely reason for this change?  (1 mark)

A fruit vendor stores mango slices in a concentrated sugar solution to preserve them. After several hours, the mango slices become soft and shriveled. What is the most likely reason for this change?  (1 mark)

A fruit vendor stores mango slices in a concentrated sugar solution to preserve them. After several hours, the mango slices become soft and shriveled. What is the most likely reason for this change?  (1 mark)

After a long ride in the sun, a girl drinks water. Why is diffusion important to her body after this activity?

After a long ride in the sun, a girl drinks water as shown below. Why is diffusion important to her body after this activity?  (1 mark)

After a long ride in the sun, a girl drinks water as shown below. Why is diffusion important to her body after this activity?  (1 mark)

After a long ride in the sun, a girl drinks water. Why is diffusion important to her body after this activity?  (1 mark)

After a long ride in the sun, a girl drinks water. Why is diffusion important to her body after this activity?  (1 mark)

Why is diffusion important to a boy sleeping peacefully under a mosquito net in a stuffy room?

Why is diffusion important to a boy sleeping peacefully under a mosquito net in a stuffy room?   (1 mark)

Why is diffusion important to a boy sleeping peacefully under a mosquito net in a stuffy room?   (1 mark)

Why is diffusion important to a boy sleeping peacefully under a mosquito net in a stuffy room?   (1 mark)

Which of the following statements correctly describes a key difference between diffusion and osmosis?

Which of the following statements correctly describes a key difference between diffusion and osmosis? (1 mark)

Which of the following statements correctly describes a key difference between diffusion and osmosis? (1 mark)

Which of the following statements correctly describes a key difference between diffusion and osmosis? (1 mark)

Which of the following statements correctly describes a key difference between diffusion and osmosis? (1 mark)

Study the image below showing two cassava sticks soaked overnight. Which one was placed in salty water and why?

During a home science activity, Achieng placed two identical cassava sticks into two bowls overnight. One bowl had salty water and the other had plain tap water. In the morning, one stick appeared soft and shrunken while the other remained firm. Study the image below and identify which stick was in salty water and explain why.   (1 mark)

During a home science activity, Achieng placed two identical cassava sticks into two bowls overnight. One bowl had salty water and the other had plain tap water. In the morning, one stick appeared soft and shrunken while the other remained firm. Study the image below and identify which stick was in salty water and explain why.   (1 mark)

During a home science activity, Achieng placed two identical cassava sticks into two bowls overnight. One bowl had salty water and the other had plain tap water. In the morning, one stick appeared soft and shrunken while the other remained firm. Study the image below and identify which stick was in salty water and explain why.   (1 mark)

Study the diagram showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes?

Study the diagram below showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes? (1 mark)

Study the diagram below showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes? (1 mark)

Study the diagram below showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes? (1 mark)

Study the diagram below showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes? (1 mark)

Study the diagram below showing water entering a plant cell and scent spreading in a room. What is the main similarity between the two processes? (1 mark)

A teacher says, “Osmosis only happens in liquids, but diffusion happens in gases, liquids and even solids.” Explain what this means by giving an example of each process. (3 marks)

A teacher says, “Osmosis only happens in liquids, but diffusion happens in gases, liquids and even solids.” Explain what this means by giving an example of each process. (3 marks)

A teacher says, “Osmosis only happens in liquids, but diffusion happens in gases, liquids and even solids.” Explain what this means by giving an example of each process. (3 marks)