Energy and Matter Cycles Quiz

What percentage of energy is available to the 1st consumer in an energy pyramid?

• 10%

• 1%

• 0.1%

• 100%

Which process in the water cycle involves the change from liquid to gas?

• Precipitation

• Evaporation

• Condensation

• Sublimation

In the carbon cycle, which process uses CO2 and produces O2?

• Respiration

• Photosynthesis

• Combustion

• Decomposition

What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

• They convert nitrogen gas into a nitrogen compound in the soil.

• They release nitrogen gas into the atmosphere.

• They decompose organic matter.

• They produce oxygen.

What would happen to the bird if the green fish died out?

• the bird population would grow

• the bird population would die out

• the smaller fish will die out

What role do producers play in an energy pyramid?

• They consume other organisms for energy.

• They decompose dead organisms and recycle nutrients.

• They convert sunlight into chemical energy through photosynthesis.

• They are the top predators in the ecosystem.

Which of the following best describes a consumer in an ecosystem?

• An organism that produces its own food.

• An organism that eats other organisms for energy.

• An organism that breaks down dead matter.

• An organism that absorbs sunlight for energy.

What is the role of decomposers in an ecosystem?

• To produce oxygen through photosynthesis.

• To consume primary producers for energy.

• To break down dead organisms and recycle nutrients back into the ecosystem.

• To serve as the primary source of energy for other organisms.

In a typical energy pyramid, which trophic level is found at the base?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers

Approximately how much energy is transferred from one trophic level to the next higher level?

• 10%

• 25%

• 50%

• 75%