Photosynthesis

What is the process in which green plants use sunlight to make their own food?

• Photosynthesis

• Respiration

• Pollination

• Transpiration

What substance in all green plants, especially in the leaves, is required for photosynthesis?

• Chlorophyll

• Chlorine

• Potassium

• Nitrogen

What do plants take in from the soil and from the air during photosynthesis?

• Hydrogen and Helium

• Carbon Dioxide and Water

• Nitrogen and Oxygen

• Sulfur and Argon

What do green plants use light energy to change into oxygen and nutrients called sugars?

• Water and Nitrogen

• Carbon Dioxide and Oxygen

• Hydrogen and Helium

• Nitrogen and Sulfur

Why is photosynthesis important for almost all living things?

• To produce sound

• To produce oxygen

• To produce light

• To produce heat

What do humans and other animals need to breathe in to survive?

• Carbon Dioxide

• Nitrogen

• Oxygen

• Helium

Which living things other than plants also make their own food through photosynthesis?

• Protozoa

• Viruses

• Bacteria

• Fungi

When did scientists first begin to study and understand photosynthesis?

• 1920s

• 2000s

• 1770s

• 1850s