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Photosynthesis: How Plants Make Food

Student
Demo Student
Class room
Grade 7 Science
score100 / 100
1
Which gas do plants take in from the air during photosynthesis?
Answer
  • Oxygen
  • Carbon dioxide
  • Nitrogen
  • Hydrogen
score15 / 15
2
Which part of a plant cell contains chlorophyll and carries out photosynthesis?
Answer
  • Nucleus
  • Cell wall
  • Chloroplast
  • Vacuole
score15 / 15
3
What is the main source of energy for photosynthesis?
Answer
  • Sunlight
  • Soil minerals
  • Wind
  • Oxygen
score15 / 15
4
Which pair of substances is produced during photosynthesis?
Answer
  • Carbon dioxide and water
  • Glucose and oxygen
  • Water and nitrogen
  • Chlorophyll and soil
score15 / 15
5
Explain the role of chlorophyll in photosynthesis.
Answer

Chlorophyll is the green pigment in chloroplasts. It absorbs light energy, which the plant uses to make glucose.

score20 / 20
6
A plant is kept in darkness for two days. Explain how the lack of light affects its ability to make glucose.
Answer

Without light, the plant cannot get the light energy needed for photosynthesis, so it cannot make new glucose by photosynthesis. It uses stored glucose for respiration.

score20 / 20