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Plant Energy Understanding Worksheet

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Plant Energy Understanding Worksheet

At a vet clinic, Mei is checking how leafy plants in the animal recovery area make and use food. Use the evidence and your science knowledge to solve the questions. Write chemical equations using words or symbols where asked.

Investigate the process

Photosynthesis converts light energy into chemical energy stored in glucose. In plant cells, chlorophyll in chloroplasts absorbs light. Plants take in carbon dioxide from the air and water from the soil. Using light energy, they form glucose and release oxygen. Plants can use glucose in respiration, build it into other substances, or store it as starch.

1.Mei says, “Plants get their food from the soil.” Correct her statement by explaining what plants make during photosynthesis and where the ingredients come from.

2.Select the two products of photosynthesis.

Glucose and oxygen
Water and carbon dioxide
Oxygen and water
Chlorophyll and glucose

3.Complete the word equation: carbon dioxide + water —(light energy and chlorophyll)→ + .

4.A student covers part of a leaf with an opaque card for several hours. Predict how this could affect photosynthesis in the covered area, and explain why.

5.True or false: The energy stored in glucose originally came from sunlight.

TrueFalse

6.Chlorophyll is found in chloroplasts. What role does chlorophyll play in photosynthesis?

7.Write the balanced symbol equation for photosynthesis. Include state symbols if you know them.

8.Dylan claims that plants do not respire because they photosynthesise. Is he correct? Explain the relationship between photosynthesis and respiration in plants.

9.A plant makes glucose faster than it can use it. Name one way it can store or use the extra glucose.

10.Explain two ways photosynthesis supports life beyond the plant that performs it.

11.Evie compares a leaf to a solar-powered food factory. Identify what the “solar power” represents and what the “food” represents, then state one limitation of the comparison.