C - Energy Transfer And Decay

Question 1

What is the source of energy for nearly all life on Earth?

Answer 1

The sun

Question 2

Green plants and algae use a small percentage of light energy from the sun to make food during ______________

Answer 2

Photosynthesis

Question 3

The energy stored from photosynthesis in plants is then passed through the ____________

Answer 3

Food chain

Question 4

Name two ways that energy is lost from a food chain?

Answer 4

As heat

As waste

Question 5

Explain why you hardly ever get food chains with more than about 5 levels

Answer 5

Because so much energy is lost that there’s not enough energy to support any more organisms after

Question 6

Energy is transferred through each member of the food chain, but a lot of it is _____ too

Answer 6

Lost

Question 7

Explain the process of decay…

Answer 7

1. Plants take in elements from the soil that then get passed through the food chain.
2. These get returned to the environment in waste products produced by the organisms, or when they die.
3. These materials decay because they are broken down by microorganisms
4. They are put back into the soil creating a constant cycle of decay

Question 8

Describe how a compost bin works…

Answer 8

• People put their kitchen waste e.g. Food peelings in a compost bin.
• The compost is decayed by microorganisms quickly as its warm and moist
• It can then be used as fertiliser and recycles the nutrients back into the soil - giving you a lovely garden!