Year9 Ecosystem

What are we, people, classified as? (check ALL that can apply)

• consumer

• producer

• herbivore

• carnivore

• omnivore

Identify which of the following are ecosystems.

• Water

• Air

• A desk

• A desert

Select which of the following parts of a marine ecosystem are abiotic factors.

• Sardines

• Seaweed

• Salinity

• Bacteria

Determine which of the following are examples of interactions between biotic and abiotic factors.

• A wolf eating a deer

• A fish burrowing under sand to hide from predators

• A river carrying sand to the sea

• A deer eating grass

Name the process in all living cells that releases the energy stored in sugar molecules.

• Photosynthesis

• Recycling

• Cellular respiration

• Decomposition

Answer explanation

Cellular respiration is a chemical reaction that takes place in the cells of all living things. It releases the stored energy from sugar molecules so that it can be used for life processes, such as movement or fighting disease.

What is an example of a properly ordered food chain

• grass, cow, bird

• grain, mouse, snake, hawk

• fungi, grass, grasshopper, bird

Triggerfish gain energy by eating crabs.

Identify how much of this energy can be transferred up the food chain to sharks. 

• Only the energy converted into heat

• Only the energy used for cellular respiration

• All of it

• Only the energy stored in body tissues

Answer explanation

Not all of the energy gained by the triggerfish can be transferred up the food chain. Some of it must be used by the triggerfish for life processes and some is lost as waste or heat. But the chemical energy stored in the triggerfish's body tissues can be transferred to sharks as food.

How many kilograms of frogs in the food chain?