Module 15: Ecosystems & Flow of Energy

An example of an abiotic factor is

• the sun

• a cow

• a mushroom

• a bacterium

What is the correct order from smallest to largest?

• biome, ecosystem, population, biosphere, community

• population, community, ecosystem, biome biosphere

• community, ecosystem, biome, population, biosphere

• biosphere, population, ecosystem, biome, community

What is the function of autotrophs in the carbon cycle?

• to use oxygen to produce glucose

• to take in excess water

• to use carbon dioxide to produce glucose

• to feed on herbivores

Plants use carbon dioxide from the atmosphere during the process of

• respiration.

• fertilization.

• evaporation.

• photosynthesis.

Which of the following processes is part of the carbon cycle?

• Decomposers put carbon into the soil by breaking down organic material.

• Factories remove carbon from the atmosphere by burning materials.

• Plants put carbon back into the atmosphere through the process of photosynthesis.

• Animals remove carbon from the atmosphere through the process of respiration.

Analyze the energy pyramid below.

Which organisms are found at level Y?

• producers

• primary consumers

• tertiary consumers

• secondary consumers

What process do microbes use to convert nitrates to nitrogen gas?

• denitrification

• fixation

• assimilation

• nitrification

Which statement correctly describes part of the carbon cycle?

• The amount of carbon in the soil increases when plants decay.

• The amount of carbon in the ocean decreases when fossil fuels are burned.

• The amount of carbon in the atmosphere decreases when igneous rocks form.

• The amount of carbon in the atmosphere increases when photosynthesis occurs.

What is the relationship between a community and a population?

• A population is smaller than a community.

• A population is larger than a community.

• A population includes communities of organisms interacting.

• A community includes populations of organisms interacting.

A large portion of rain forest was removed and scientists noted a local increase in atmospheric carbon levels. Which best explains this observation?

• Removing the rain forest caused an increase in the levels of cellular respiration, which put more carbon dioxide into the atmosphere.

• Removing the rain forest caused an increase in the number of microorganisms, which put more carbon dioxide into the atmosphere.

• Removing the rain forest decreased the number of plants, which would normally decrease the carbon dioxide levels in the atmosphere through photosynthesis.

• Removing the rain forest caused a decrease in the number of animals, which would normally decrease the carbon dioxide levels in the atmosphere through cellular respiration.