# Exchange surfaces and surface area to volume ratio

In this lesson, you will learn about the concept of surface area to volume ratio and the examples of exchange of materials at different surfaces.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.What is diffusion?

1/5

Q2.Why would a higher temperature speeds up the rate of diffusion?

2/5

Q3.Why would a larger surface area increase the rate of diffusion?

3/5

Q4.Find the magnification if a cell of 0.01 mm is 4 mm under the microscope.

4/5

Q5.Which TWO of the following are likely to diffuse into cells?

Select two (2) boxes

5/5

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, letâ€™s see what you can remember from this topic. Hereâ€™s a quick quiz!

Q1.What is diffusion?

1/5

Q2.Why would a higher temperature speeds up the rate of diffusion?

2/5

Q3.Why would a larger surface area increase the rate of diffusion?

3/5

Q4.Find the magnification if a cell of 0.01 mm is 4 mm under the microscope.

4/5

Q5.Which TWO of the following are likely to diffuse into cells?

Select two (2) boxes

5/5

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the â€˜Resume Videoâ€™ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click â€˜Nextâ€™ below.

Quiz:

# Exchange surfaces and surface area to volume ratio

This quiz will assess you on your knowledge in diffusion, cells and exchange surfaces.

Q1.True or false: Eukaryotic cells have plasmids.

1/5

Q2.Root hair cells contain a lot of mitochondria to...

2/5

Q3.What does a surface area to volume ratio of 8 : 1 mean?

3/5

Q4.Which of the following is a common feature found in the human alveoli and the villi?

4/5

Q5.What is the substance that usually diffuses out of the blood at the alveoli and into the space of the lungs?

5/5

Quiz:

# Exchange surfaces and surface area to volume ratio

This quiz will assess you on your knowledge in diffusion, cells and exchange surfaces.

Q1.True or false: Eukaryotic cells have plasmids.

1/5

Q2.Root hair cells contain a lot of mitochondria to...

2/5

Q3.What does a surface area to volume ratio of 8 : 1 mean?

3/5

Q4.Which of the following is a common feature found in the human alveoli and the villi?

4/5

Q5.What is the substance that usually diffuses out of the blood at the alveoli and into the space of the lungs?

5/5

# Lesson summary: Exchange surfaces and surface area to volume ratio

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Chair yoga