Flow of Energy-Ecosystems

A food web diagram is provided. Which of the following depend on producers for energy?

• Diatoms

• Shrimp

• Squid

• Amphipods

How are primary consumers different from secondary consumers?

• Primary consumers eat only plants; secondary consumers eat other consumers.

• Primary consumers eat other consumers; secondary consumers eat only plants.

• Primary consumers eat plants and other consumers; secondary consumers eat plants and decompose matter.

• Primary consumers eat plants and decompose matter; secondary consumers eat plants and other consumers.

Sheep are herbivorous. What can you infer from this?

• They are primary consumers.

• They are producers.

• They are secondary consumers.

• They are decomposers.

Matter is passed from the living part of an ecosystem to the non-living part when which of the following takes place?

• Plants absorb gases

• Plants decompose

• Animals eat plants

• Animals drink water

The energy organisms need to live and grow first enters the ecosystem when –

• plants take in light energy from the Sun.

• decomposers break down dead organisms.

• primary consumers eat plants for food.

• secondary consumers eat primary consumers.

A food web diagram is provided. Based on the diagram, it is reasonable to conclude that matter could follow which of the following paths as it cycles through this ecosystem?

• sun > grass > robin

• plant seeds > field mouse > robin

• eagle > deer > plant seeds

• grass > deer > mountain lion

Which of the following observations would support the claim that as plants absorb sunlight to make food, they release oxygen into the environment?

• Oxygen concentration in the atmosphere was much higher millions of years ago when different plants existed.

• When plants are kept in a sealed environment, the concentration of carbon dioxide steadily goes down.

• Plants that are kept under conditions of total darkness fail to grow normally and eventually will die.

• The oxygen concentration in a pond with many plants increases during the day and decreases at night and on cloudy days.

A water environment

• Producers

• Decomposer

• Consumer

• Aquatic

• Terrestrial

Able to transform the energy of the Sun to make food

• Producer

• Decomposer

• Consumer

• Aquatic

• Terrestrial

Organism that must consume other organisms

• Producer

• Decomposer

• Consumer

• Aquatic

• Terrestrial