Unit 6: Energy Flow in Ecosystems CFA (Post-Test)

What is the amount of energy received from sunlight per year?

• 1,700,000 kcal/m²/yr

• 20,810 kcal/m²/yr

• 13,187 kcal/m²/yr

• 5,060 kcal/m²/yr

Which statement BEST describes how matter and energy move among organisms in a food web?

• Matter and energy flows among organisms in the system, and both matter and energy are conserved.

• Matter and energy both flow among organisms in the system, but only energy is conserved.

• Only Energy cycles among all organisms in the system, and is not conserved.

• Matter and energy flows among organisms in the system, but only matter is conserved.

Which of the following is a producer in the ocean food web?

• Plankton

• Phytoplankton

• Sea turtles

• Octopuses

What role do decomposers play in the ecosystem?

• Decomposers break down waste and dead matter, recycling nutrients back into the ecosystem.

• Decomposers produce energy from sunlight through photosynthesis.

• Decomposers hunt and consume other animals for food.

• Decomposers build shelters for other organisms in the ecosystem.

Refer to the diagram 'Energy flow in ecosystem'. Fill in the blank: The net productivity of primary consumers is ______ kcal/m²/yr.

Which describes the MOST LIKELY effect on the Phytoplankton's biomass if more Plankton moved into the ocean ecosystem?

• The biomass would be higher because there would be fewer phytoplankton to store energy.

• Biomass would be higher because there would be less energy lost as heat from the phytoplankton.

• The Biomass would be lower for the phytoplankton since there are more consumers now.

• Biomass would be lower because there would be more energy lost as heat from the phytoplankton.

Which organism is at the top of the food chain in the diagram?

• Aquatic plants

• Caddisfly larva

• Bluegill fish

• Largemouth bass fish

Refer to the energy pyramid diagram. Which group is at the base of the energy pyramid and stores the most energy as biomass?

• Primary consumers

• Secondary consumers

• Primary producers

• Tertiary consumers

In the ocean food web, ________ eat sardines.

• Sea bass, Sea birds, Whale sharks

• Dolphins, Jellyfish, Crabs

• Octopuses, Sea turtles, Plankton

• Seals, Starfish, Sea urchins

Largemouth bass fish are not producers because they are not able to make their own food, and they receive the lowest amount of energy in the pyramid as the tertiary consumers.

• producers that make their own food.

• primary consumers that eat plants.

• secondary consumers that eat primary consumers.

• consumers that receive the smallest amount of energy in the pyramid conditioned