Decay

This lesson looks at the causes of decay and why it's so important. We then look at the conditions required for decay and how a compost bin is designed to increase the rate of decay.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.Name the organism in a food chain that goes on the bottom of a pyramid of numbers.

1/7

Q2.Select the correct pyramid of numbers for the following food chain: Oak trees -> Winter Moth Caterpillar -> Great Tits -> Sparrowhawks

2/7

Q3.Select the correct pyramid of biomass for the following food chain: Oak trees -> Winter Moth Caterpillar -> Great Tits -> Sparrowhawks

3/7

Q4.If the key of a pyramid of numbers states that 10 organisms equals 1 square, how many squares would 100 organisms be?

4/7

Q5.What is the definition of biomass?

5/7

Q6.How is energy transferred from organisms at one trophic level in a food chain to organism at the next?

6/7

Q7.How is energy lost to the surroundings at each trophic level in a food chain?

7/7

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Q1.Name the organism in a food chain that goes on the bottom of a pyramid of numbers.

1/7

Q2.Select the correct pyramid of numbers for the following food chain: Oak trees -> Winter Moth Caterpillar -> Great Tits -> Sparrowhawks

2/7

Q3.Select the correct pyramid of biomass for the following food chain: Oak trees -> Winter Moth Caterpillar -> Great Tits -> Sparrowhawks

3/7

Q4.If the key of a pyramid of numbers states that 10 organisms equals 1 square, how many squares would 100 organisms be?

4/7

Q5.What is the definition of biomass?

5/7

Q6.How is energy transferred from organisms at one trophic level in a food chain to organism at the next?

6/7

Q7.How is energy lost to the surroundings at each trophic level in a food chain?

7/7

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 ‘Resume Video’ 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 ‘Next’ below.

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Decay

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Q1.What is decompostion?

1/8

Q2.What is the role of the detritivores?

2/8

Q3.Which of the following is an example of a microbe?

3/8

Q4.Which factor does not affect the rate of decay?

4/8

Q5.Which factor will kill the decomposers if it's too high?

5/8

Q6.How does volume of water affect rate of decomposition?

6/8

Q7.Why do we wrap our food in cling film?

7/8

Q8.Which of the following statements best explains the design of a compost bin?

8/8

This quiz includes images that don't have any alt text - please contact your teacher who should be able to help you with an audio description.

Quiz:

Decay

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Q1.What is decompostion?

1/8

Q2.What is the role of the detritivores?

2/8

Q3.Which of the following is an example of a microbe?

3/8

Q4.Which factor does not affect the rate of decay?

4/8

Q5.Which factor will kill the decomposers if it's too high?

5/8

Q6.How does volume of water affect rate of decomposition?

6/8

Q7.Why do we wrap our food in cling film?

7/8

Q8.Which of the following statements best explains the design of a compost bin?

8/8

Lesson summary: Decay

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