The gradual change of organisms in an ecosystem that follows an event such as a volcanic eruption is called:

The use of less of something to make its supply last longer is called:

A place in the environment that meets the need of an organism is called a(an)

An organism that makes its own food is called a(an)

Plants make their own food through a process called:

The transfer of food energy from one organism to the next is called a(an)

A diagram that shows that energy is lost at each level in a food chain is called a(an)

Which is the initial source of energy in most ecosystems?

Marc gets a pet rabbit for his birthday. He looks online and learns that rabbits are herbivores. Which of the following foods might he feed his pet rabbit?

Carla wants to show how living things get energy. Which sequence is correct?

Which animal is a carnivore?

An ecosystem includes the food chain. pine seed $$\rightarrow$$  mouse $$\rightarrow$$  snake $$\rightarrow$$  hawk. What would happen if all the mice died from a disease?

Sal is doing a report on photosynthesis. He draws a diagram to represent the materials used by plants to make food and the byproducts that this process produces. Which is correct?

A new highway is planned to replace a pond habitat where a frog population lives. How will this change most likely affect the frog population?

Emily is studying animals that live in marshes. She makes the following graphs to show how the number of fish and marsh birds changed in a certain area over time. Which most likely happened when the number of fish was highest?