Photosynthesis

What do plants need from the soil?

• Oxygen and carbon dioxide.

• Water and nutrients.

• Sunlight and heat.

• Minerals and metals.

What is the compound that plants use to absorb the energy from sunlight?

• Chlorophyll

• Carotene

• Xanthophyll

• Melanin

What do plants take in from the air during photosynthesis?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

What is the main purpose of photosynthesis?

• To produce food for the plant.

• To absorb carbon dioxide from the atmosphere.

• To release oxygen into the air.

• To provide energy for animal life.

Why is chlorophyll important for plants?

• It helps them absorb sunlight.

• It provides structural support to the plant.

• It stores nutrients for the plant.

• It protects the plant from pests.

What part of the plant is primarily responsible for photosynthesis?

• Roots

• Stems

• Leaves

• Flowers

What is the role of sunlight in photosynthesis?

• It provides energy for the process.

• It absorbs carbon dioxide from the atmosphere.

• It helps in the formation of soil nutrients.

• It cools the plant during the night.

What do leaves use the energy from the sun to change carbon dioxide and water into?

• Oxygen

• Sugar

• Starch

• Protein

What process do plants use to make their food?

• Respiration

• Photosynthesis

• Fermentation

• Transpiration

What three things do plants need to grow?

• Water, air, and sunlight.

• Soil, nutrients, and darkness.

• Water, soil, and minerals.

• Air, sunlight, and temperature.