Matter & Energy in Ecosystems Review

Which level of an energy pyramid is able to support the least amount of organisms?

• the top level

• the middle level

• the bottom level

What is a consumer?

• they get energy by killing and eating other animals or by eating plants

• they can make their own food from sunlight, h2o, and co2

What elements of the Earth system can matter be transferred between?

• from living organism to another living organism

• from living organism to physical environment

• from physical environment to living organism

• All of these are correct

What do the laws of conservation of energy and matter say?

• the total amount of energy and matter always remains the same

• the total amount of energy and matter are always changing

What do the arrows in a food chain show?

• the direction or flow of energy and matter in an ecosystem

• what eats what

• the animals habitat

• the animals adaptations

How do the nutrients in the soil become building materials for a plant to grow?

• the plant absorbs nutrients into its cells and connects them together

• the plant will reject all nutrients

• the plant will only hold the nutrients in its roots

What happens to the total amount of energy in a closed system, like a food chain?

• it remains constant and is neither created or destroyed

• it constantly changes and is created and destroyed all the time

What is the process called when plants make food using energy from chemicals instead of sunlight?

• chemosynthesis

• photosynthesis

What is a trophic level?

• an organisms feeding level in a food chain/food web

• the predator/prey relationship

• symbiotic relationships

What kind of organism comes last in every food chain/food web?

• decomposers

• producers

• primary consumers

• secondary consumers