Photosynthesis

What are the reactants of photosynthesis?

• oxygen and carbon dioxide

• oxygen and glucose

• carbon dioxide and water

• water and glucose

What are the products of photosynthesis?

• oxygen and carbon dioxide
• oxygen and glucose
• carbon dioxide and water
• water and glucose

What is the chemical formula for glucose?

• C₆H₁₂O₆
• C₆H₆O₁₂
• C₁₂H₆O₁₂
• C₆O₂H₆

What is the chemical formula for water?

• H₂O
• HO₂
• CHO₂
• CO₂H

What is the chemical formula for carbon dioxide?

• H₂O
• CO₂
• CHO₂
• CO₂H

What is the chemical formula for oxygen?

• H₁₂O₂
• C₆O₂
• O₃
• O₂

Why are plants usually green?

• Because the chlorophyll reflects green light

• Because the chlorophyll absorbs green light

• Because the accessory pigments combine to make green

• Because the accessory pigments only absorb green light

Which of these conditions would decrease the rate of photosynthesis in a plant?

• Above average precipitation
• Changing the daylight hours from 14 hrs to 10 hrs
• Changing the CO₂ concentration from 380 ppm to 410 ppm
• All of these choices

Which choice correctly shows the gases that enter and exit plants during photosynthesis?

• Enter: Oxygen
  Exit: Carbon dioxide
• Enter: Water vapor
  Exit: Glucose
• Enter: Carbon dioxide
  Exit: Oxygen
• Enter: Light
  Exit: Water vapor

After photosynthesis, plants store their energy as _________ .

• chlorophyll
• pigment
• glucose (sugar)
• Oxygen