Cycles of Matter Quiz

Why is water considered a crucial element for life on Earth?

• It is essential for the survival of organisms.

• It is the main source of energy.

• It is a building block of macromolecules.

• It is the only liquid on Earth.

How does matter differ from energy in an ecosystem?

• Matter is recycled, while energy is lost as heat.

• Matter is lost as heat, while energy is recycled.

• Both matter and energy are recycled.

• Energy is recycled, while matter is lost as heat.

Which of the following is NOT a process that cycles matter through ecosystems?

• Biological processes

• Photosynthesis

• Geological processes

• Human activities

What role do decomposers play in the cycling of matter?

• They convert energy into matter.

• They prevent the recycling of matter.

• They decompose organisms and return nutrients to the soil.

• They produce energy for the ecosystem.

What is the primary way water moves from the ocean to the atmosphere?

• Precipitation

• Runoff

• Condensation

• Evaporation

Which nutrient cycle involves the conversion of nitrogen gas into a usable form by bacteria?

• Phosphorus cycle

• Nitrogen cycle

• Carbon cycle

• Water cycle

What is the main form of carbon found in the atmosphere?

• Methane

• Carbon monoxide

• Carbon dioxide

• Carbonate

Why is phosphorus less abundant in the biosphere compared to nitrogen and carbon?

• It is a gas in the atmosphere.

• It is primarily found in rocks.

• It is not needed by living organisms.

• It is only found in water.

What process in the nitrogen cycle returns nitrogen gas back to the atmosphere?

• Denitrification

• Photosynthesis

• Respiration

• Nitrogen fixation

Which of the following is a key component of DNA and RNA molecules?

• Carbon

• Nitrogen

• Oxygen

• Phosphorus