Nat 5 Key Area 3.4 Energy in Ecosystems

Which of the following is not a way in which energy is lost from a food chain?

• Undigested materials

• Growth

• Movement

• Heat

What do the arrows in a food chain represent?

• Which organism eat which

• Consumers

• Transfer of energy

• Producers

Which letter in the pyramid represents a primary consumer?

• A

• B

• C

• D

Which letter in the pyramid represents the producer?

• A

• B

• C

• D

Three pyramids of numbers are shown below. Which pyramid shows that a parasite is part of the food chain?

• A

• B

• C

Three pyramids of numbers are shown below. Which pyramid is most likely to have a tree as the producer?

• A

• B

• C

What do you call a diagram that shows the population sizes of organisms at each level of a food chain?

• Pyramid of biomass

• Pyramid of energy

• Pyramid of numbers

• Pyramid of animals

An ecosystem receives 5,000,000 units of energy from the sun. Of this energy, 95% is not used in photosynthesis. The amount of energy captured by the producers is

• 475,000

• 25,000

• 250,000

• 4,750,000

The diagram below shows the transfer of energy through a food chain in a wood. The numbers represent the units of energy in the different populations of the food chain. 4% of the light energy reaching the oak tree is converted into new plant material. How much energy did the oak tree receive?

• 28,800

• 1200

• 2880

• 12,000

Which food chain is represented by the following pyramid?

• grass -> beetle -> spider -> robin

• oak tree-> greenfly -> ladybird -> blackbird

• plant plankton -> mayfly larvae -> water beetle -> stickleback

• beech tree -> squirrel -> fox