Flashcard 3.4 Cycles of Matter

Front

What is the role of nitrogen in living organisms?

Back

Nitrogen is an important nutrient needed to make proteins and nucleic acids (DNA & RNA). It makes up 78% of Earth's atmosphere in gaseous form.

Front

What is the gaseous form of water called?

Back

Water vapor.

Front

Which cycle do fossil fuels belong to?

Back

The carbon cycle.

Front

Why is carbon considered an important nutrient?

Back

Carbon is a major component of all organic molecules, including carbohydrates, lipids, nucleic acids, and proteins.

Front

How does matter move through the biosphere?

Back

Matter is recycled within and between ecosystems.

Front

What are the main components of the carbon cycle?

Back

The main components include carbon dioxide, photosynthesis, respiration, decomposition, and fossil fuel formation.

Front

What is the significance of the water cycle in ecosystems?

Back

The water cycle is crucial for maintaining the availability of water for organisms, regulating climate, and supporting plant growth.

Front

Define the term 'ecosystem'.

Back

An ecosystem is a community of living organisms interacting with their physical environment.

Front

What is the process of photosynthesis?

Back

Photosynthesis is the process by which green plants use sunlight to convert carbon dioxide and water into glucose and oxygen.

Front

What role do decomposers play in the nutrient cycle?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and making them available for plants.