9th grade plants
9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-LS1-5 · England: GCSE Combined Science: Bioenergetics
Name
Date
Score/ 16
Question 1
A leaf makes 3 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 2
Which is the balanced symbol equation for photosynthesis?
- A. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- B. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- C. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 3
Is photosynthesis exothermic or endothermic?
- A. exothermic: it releases oxygen
- B. endothermic: energy is transferred from light to the chemical store in glucose
- C. neither
- D. exothermic: it releases heat
Question 4
A leaf makes 10 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 5
Which is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- B. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- C. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
Question 6
Is photosynthesis exothermic or endothermic?
- A. neither
- B. endothermic: energy is transferred from light to the chemical store in glucose
- C. exothermic: it releases oxygen
- D. exothermic: it releases heat
Question 7
A leaf makes 10 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 8
Which is the balanced symbol equation for photosynthesis?
- A. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- B. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
- C. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- D. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Question 9
In photosynthesis, where does the oxygen gas released come from?
- A. the soil
- B. water molecules that are split
- C. glucose
- D. nitrogen in the air
Question 10
A leaf makes 2 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many water molecules are used?
Answer
Question 11
Which is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 3O₂
- B. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- C. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
- D. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
Question 12
Is photosynthesis exothermic or endothermic?
- A. endothermic: energy is transferred from light to the chemical store in glucose
- B. exothermic: it releases heat
- C. neither
- D. exothermic: it releases oxygen
Question 13
A leaf makes 5 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
Question 14
Which is the balanced symbol equation for photosynthesis?
- A. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
- B. CO₂ + H₂O → C₆H₁₂O₆ + O₂
- C. 6O₂ + 6H₂O → C₆H₁₂O₆ + 6CO₂
- D. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
Question 15
Which substance in chloroplasts absorbs the light?
- A. glucose
- B. chlorophyll
- C. cellulose
- D. starch
Question 16
A leaf makes 4 molecules of glucose by photosynthesis. Using 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, how many oxygen molecules are released?
Answer
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