Biogeochemical Cycles and Energy Flow

Front

What is the main element that cycles through all parts of the nitrogen cycle?

Back

Nitrogen.

Front

In a food chain, which type of consumer receives the least amount of energy?

Back

Tertiary consumer.

Front

What is the correct sequence of processes in the carbon cycle?

Back

Respiration → Photosynthesis → Organic decay → Coal formation.

Front

If a plant captures 100% of the energy from photosynthesis, how much energy is available to the hawk in the food chain: grass → grasshopper → mouse → snake → hawk?

Back

0.01%.

Front

What is the missing step in the water cycle sequence: ocean → evaporation → ________ → precipitation → runoff?

Back

Condensation.

Front

What is the process by which plants convert carbon dioxide into organic compounds using sunlight?

Back

Photosynthesis.

Front

What is the role of decomposers in biogeochemical cycles?

Back

Decomposers break down dead organic matter, returning nutrients to the soil.

Front

What is the significance of the water cycle in ecosystems?

Back

The water cycle is essential for maintaining the availability of water for organisms and regulating climate.

Front

What is the primary source of energy for the Earth's ecosystems?

Back

The Sun.

Front

How does energy transfer through a food chain?

Back

Energy decreases as it moves from producers to primary consumers, secondary consumers, and tertiary consumers.