Unit 1 Pre-assessment

Front

What is the efficiency of energy conversion if a plant absorbs 1000 J of light energy and stores 100 J as chemical energy?

Back

10% efficiency is calculated as (100 J / 1000 J) * 100.

Front

What are aerobic conditions?

Back

Aerobic conditions refer to the presence of oxygen.

Front

What is the main gas taken in by plants during photosynthesis?

Back

Carbon dioxide is the main gas taken in by plants during photosynthesis.

Front

What is the net change in atmospheric carbon if 1000 kg of carbon enters the biosphere and 900 kg returns to the atmosphere?

Back

The net change is a 100 kg decrease in atmospheric carbon.

Front

What happens to carbon when animals eat plants?

Back

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants use sunlight to synthesize foods with the help of chlorophyll, converting carbon dioxide and water into glucose and oxygen.

Front

What is respiration in biological terms?

Back

Respiration is the process by which living organisms convert glucose and oxygen into energy, producing carbon dioxide and water as byproducts.

Front

Explain the carbon cycle.

Back

The carbon cycle is the process through which carbon is exchanged between the atmosphere, land, water, and living organisms, involving processes like photosynthesis, respiration, and decomposition.

Front

What role do decomposers play in the ecosystem?

Back

Decomposers break down dead organic matter, returning nutrients to the soil and playing a crucial role in nutrient cycling.

Front

What is the significance of chlorophyll in photosynthesis?

Back

Chlorophyll is the green pigment in plants that absorbs light energy, essential for the process of photosynthesis.