Photosynthesis Concepts and Processes

Photosynthesis is the process by which green plants use sunlight, water, and carbon dioxide to create their own food, primarily glucose, and release oxygen. This process mainly occurs in the leaves, where chlorophyll captures sunlight. Stomata on leaves absorb carbon dioxide and release oxygen. Photosynthesis is crucial as it provides energy for plants and animals and maintains the balance of oxygen and carbon dioxide in the atmosphere, reducing the greenhouse effect.

What is the primary function of photosynthesis in green plants?

• To absorb nutrients from the soil

• To convert sunlight into energy

• To produce oxygen for animals

• To create food from water and carbon dioxide

Which of the following is NOT a material required for photosynthesis?

• Nitrogen

• Chlorophyll

• Carbon dioxide

• Water

What are the main products of photosynthesis?

• Chlorophyll and sunlight

• Nitrogen and oxygen

• Water and carbon dioxide

• Glucose and oxygen

Where does photosynthesis primarily occur in plants?

• Flowers

• Leaves

• Stems

• Roots

What is the role of stomata in the process of photosynthesis?

• To absorb sunlight

• To release glucose

• To exchange gases

• To store water

How does chlorophyll contribute to photosynthesis?

• By releasing oxygen

• By storing glucose

• By capturing sunlight energy

• By absorbing water

Why is photosynthesis crucial for the balance of gases in nature?

• It eliminates greenhouse gases

• It maintains the balance of carbon dioxide and oxygen

• It reduces oxygen levels

• It increases carbon dioxide levels

What is one of the significant benefits of photosynthesis for animals?

• It gives them carbon dioxide

• It offers them oxygen for respiration

• It supplies them with glucose

• It provides them with chlorophyll