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Grade 9 Photosynthesis & Respiration Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Biology

Unit 5: Going FurtherAdvanced: Biology II PreviewNGSS HS-LS1-5Advanced

Photosynthesis and cellular respiration: their inputs, outputs and where each takes place in the cell. This free high school worksheet has 16 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Photosynthesis & Respiration

Grade 9 · Biology

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Class

Date

Learning goal: Advanced: Biology II Preview · NGSS HS-LS1-5

Directions: This worksheet has 3 parts. Read the instructions at the start of each part.

Part A

Label the diagram. Use the words in the box.

Word bank

sunlightwatercarbon dioxideoxygen
glucose1234
  1. 1
  2. 2
  3. 3
  4. 4
Part B

Match each clue to the right word. Write the letter in the box.

  1. 5What gas do plants release as a byproduct of photosynthesis?
  2. 6Where in a plant cell does photosynthesis take place?
  3. 7What sugar is made during photosynthesis?
  4. 8What pigment captures light energy for photosynthesis?
  5. 9What gas do plants take in for photosynthesis?
  6. 10Which organelle is the site of cellular respiration in a cell?
  • AChloroplasts
  • BMitochondria
  • CCarbon dioxide
  • DGlucose
  • EOxygen
  • FChlorophyll
Part C

Answer each question. Use full sentences where you can.

  1. 11

    Name two factors that can limit the rate of photosynthesis.

  2. 12

    Write the general word equation for photosynthesis.

  3. 13

    Write the general word equation for aerobic respiration.

  4. 14

    Write the balanced chemical equation for aerobic respiration.

  5. 15

    Do plants carry out cellular respiration as well as photosynthesis?

  6. 16

    What are the two stages of photosynthesis?

★ Challenge corner for fast finishers

Ice floats in water. What does that tell you about its density?

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Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/biology/9/bio_photosynthesis_respiration

Answer key (click to show)
  1. 1.sunlight
  2. 2.carbon dioxide
  3. 3.oxygen
  4. 4.water
  5. 5.E — oxygen
  6. 6.A — the chloroplasts
  7. 7.D — glucose
  8. 8.F — chlorophyll
  9. 9.C — carbon dioxide
  10. 10.B — the mitochondria
  11. 11.light intensity, carbon dioxide concentration or temperature (any two)
  12. 12.carbon dioxide + water (+ light) → glucose + oxygen
  13. 13.glucose + oxygen → carbon dioxide + water (+ energy)
  14. 14.C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O (+ ATP)
  15. 15.yes, all living cells respire
  16. 16.the light-dependent reactions and the Calvin cycle (light-independent reactions)
  17. ★ice is less dense than liquid water (challenge corner)

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