Energy and Matter in Ecosystems PRACTICE

The diagram shows the flow of organic molecules through an ecosystem. What two processes are identified by the labels X and Y?

• X : Photosynthesis, Y : Respiration

• X : Decomposition, Y : Respiration

• X : Fermentation, Y : Transpiration

• X : Nitrogen Fixation, Y : Respiration

Which is NOT a consumer?

• mushroom

• bird

• carnivore

• omnivore

What does an energy pyramid show?

• Energy flow in a community

• The number of species in an ecosystem

• The distribution of biomass in a habitat

• The types of organisms in a food chain

In the energy pyramid, what comes after the producers?

• First-Level Consumers

• Secondary Consumers

• Tertiary Consumers

• Decomposers

What is this called?

• Food Web

• Food Chain

• Abiotic Factors

• Ecosystem Dynamics

What is the water cycle?

• the movement of water on, above, or below the surface of the Earth

• the process of water freezing into ice

• the evaporation of water from plants

• the collection of water in rivers and lakes

Which organism receives the least amount of energy from the producer?

• Owl

• Grasshopper

• Lilypad

• Mouse

Which are decomposers?

• humans

• trees

• red wolves

• worms

In this Food Web Pyramid, which type of consumer gets only 10% of the energy stored in plants?

• Herbivore

• Carnivore

• Omnivore

• Secondary Consumer

A consumer gets energy by

• feeding on other organisms.

• producing its own food through photosynthesis.

• absorbing nutrients from the soil.

• breaking down dead organic matter.