Energy Flow and Cycles

The steps of the water cycle in order of A, B, and C in the diagrams are ________________.

• evaporation, condensation, precipitation.

• evaporation, transpiration, precipitation.

• precipitation, condensation, evaporation.

• precipitation, transpiration, condensation.

To complete the carbon cycle, plants give off ________ while animals give off ____________.

• hydrogen -- oxygen

• oxygen -- carbon dioxide

• carbon dioxide -- oxygen

• sulfur dioxide -- oxygen

What do decomposers do in the ecosystem?

• break down dead organisms to provide nitrogen

• eat living organisms

• use nitrogen for photosynthesis

• use light to make food

Which level in a food web has the most available energy?

• Producers

• Primary Consumers

• Decomposers

• Secondary Consumers

Which organisms are producers?

• Tree

• Shrew

• Snake

• Grasshopper

• Shrub

Which of the following is an example of a producer found in the ocean?

• Phytoplankton

• Shrimp

• Whale

• Jellyfish

If a hawk eats a mouse that eats grass, the hawk is a _______________.

• First-Level Consumer

• Decomposer

• Second-level consumer

• Producer

Energy enters an ecosystem through __________________.

• Digestion of carnivores

• Photosynthesis

• Precipitation from water cycle

• Respiration of animals

Clouds are formed when water vapor cools and condenses in a liquid state. Eventually, the air in the cloud becomes saturated with water. The water droplets that create the cloud combine, forming larger droplets which become heavier. What happens next?

• The water droplets fall to the Earth as rain.

• The water's weight causes the cloud to move, which we feel as wind.

• The water is absorbed into the atmosphere.

• The water droplets evaporate and become water vapor again.

How does most of the water in the water cycle move from lakes and rivers directly back into the atmosphere?

• Respiration

• Evaporation

• Precipitation

• Condensation