Grade 9 Revision Worksheet

Gerald is studying the plants and animals of a meadow. He classifies the grasses and clover as ______________ because they make their own food through the process of ___________. He classifies insects that feed on the clover as _____________ because he thinks they eat only plant matter, not animal matter.

Plants are identified as a _______________________

• Primary Producer

• Consumer

Animals are identified as a _______________________

• Primary Producer

• Consumer

Which organism is the producer?

• Frog

• Grass

• Grasshopper

• Hawk

What do you call organisms that can make their own food?

• heterotophs

• autotrophs

• trophies

Organisms that cannot make their own food and must get energy from eating other organisms are called...

• autotrophs

• heterotrophs

• plants

The main difference between photosynthesis and chemosynthesis is:

• Photosynthesis gives off carbon doxide, while chemosynthesis gives off oxygen

• photosynthesis happens in the dark, while chemosynthesis happens in light

• photosynthesis uses chemicals (hydrogen sulfide) to make food, while chemosynthesis uses light

• chemosynthesis uses chemicals (hydrogen sulfide) to make food, while photosynthesis uses sunlight

Which of the following has the largest population in the Indian River Lagoon system?

• Crab

• Egret

• Flounder

• Phytoplankton

Which of the following statements best describes the flow of energy in the energy pyramid above?

• As you go higher in the pyramid, the amount of energy increases.

• There is less energy in a producer level than a consumer level.

• There is no energy above the level of producers in the system.

• Each group receives only a small amount of the energy from the level below it.

fly → frog → snake → alligator

The arrows indicate the direction of the flow of

• energy.

• water

• oxygen

• carbon dioxide