CFB Biology U4 Review 11A/B

Front

What is the function of stomata in plants?

Back

Stomata are small openings on the surfaces of leaves and stems that allow for gas exchange, specifically the intake of carbon dioxide and the release of oxygen during photosynthesis.

Front

What happens to the mass of water when it freezes?

Back

The mass of water remains the same when it freezes; for example, 200 g of water will still weigh 200 g when it becomes ice.

Front

What is the law of conservation of mass in chemical reactions?

Back

The law of conservation of mass states that in a closed system, the total mass of reactants must equal the total mass of products; thus, if you start with 20 g of reactants, you will produce 20 g of products.

Front

What are the inputs and outputs of photosynthesis?

Back

During photosynthesis, the inputs are carbon dioxide and water, and the outputs are glucose and oxygen.

Front

What role do enzymes play in chemical reactions?

Back

Enzymes act as catalysts that speed up chemical reactions by lowering the activation energy required for the reaction to occur.

Front

Define photosynthesis.

Back

Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose, using carbon dioxide and water.

Front

What is the primary pigment involved in photosynthesis?

Back

Chlorophyll is the primary pigment involved in photosynthesis, responsible for absorbing light energy.

Front

Explain the process of cellular respiration.

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy (ATP), carbon dioxide, and water.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form or appearance of a substance without changing its chemical composition, while a chemical change results in the formation of new substances.

Front

What is the role of chloroplasts in plant cells?

Back

Chloroplasts are organelles in plant cells that conduct photosynthesis, converting light energy into chemical energy.