U3 Key Area 4- Energy In Ecosystems

Question 1

What do all organisms contain

Answer 1

All organisms contain energy

Question 2

Where does energy initially come from

Answer 2

Energy initially comes from the sun

Question 3

How is energy passed to different organisms

Answer 3

Energy is passes from organism to organism along the food chain.

Question 4

What do food chains always begin with

Answer 4

Food chains always begin with producers (green plant)

Question 5

What are primary consumers

Answer 5

Animals that eat the producer

Question 6

What is the secondary consumer

Answer 6

The animal that eats the primary consumer

Question 7

What happens each time an organism is eaten

Answer 7

Energy passes along the food chain

Question 8

What does the arrows in food chains represent

Answer 8

The arrow indicates the direction of energy flow

Question 9

How much energy is lost when passes onto other animals

Answer 9

90%

Question 10

How much energy does the next organism get for killing the previous animal

Answer 10

10%

Question 11

What ways are energy lost in a food chain (3)

Answer 11

• Some food is undirected and will be passed in faeces
• Some energy gained by consumers is used in movement
• Some of the energy gained by the consumer is used in warm-blooded animals for keeping them warm