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Photosynthesis in Plants Worksheet

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Photosynthesis in Plants Worksheet

Explore how plants make food. Read the investigation scenario, then answer each question. Use the visual model to help explain your ideas.

A plant investigation

At a hardware store, Sione and Georgia are checking two potted seedlings for a science display. Both receive water. One stands by a bright window; the other is kept in a dark cupboard. After several days, the window seedling is green and growing, while the cupboard seedling is pale and weak. Plants make glucose using light energy, water and carbon dioxide. This process is called photosynthesis. It happens mainly in the chloroplasts of leaf cells. Chlorophyll in chloroplasts absorbs light. Carbon dioxide enters leaves through tiny pores called stomata, and water is carried up from the roots. Oxygen is released through the stomata. Plants use glucose for energy and growth, and can store extra glucose as starch.

Investigate the process

1.Which statement best describes photosynthesis?
  • Plants absorb food from the soil.
  • Plants use light energy to make glucose from water and carbon dioxide.
  • Plants turn oxygen into sunlight.
  • Plants use chlorophyll to make water.
2.In which part of a leaf cell does most photosynthesis take place?
3.Complete the word equation: water + carbon dioxide + light energy → + .
4.What is chlorophyll, and what does it do during photosynthesis?
5.Carbon dioxide enters a leaf through tiny pores called .
6.What gas is released by a leaf during photosynthesis?
7.Georgia says, “Soil is one of the ingredients plants use to make glucose.” Is she correct? Explain briefly.
8.The cupboard seedling received water but almost no light. Explain why it became pale and weak.
9.Plants can use glucose or store some of it as starch. Give one reason a plant needs glucose.
10.Imagine the store display is moved away from the window but continues to receive water. Predict one change you might observe and explain the cause.
11.Why is photosynthesis important to animals as well as plants? Give two linked reasons.

2 printable pages

  • Photosynthesis in Plants Worksheet, page 1 of 2: A plant investigation, Investigate the process

    Page 1

  • Photosynthesis in Plants Worksheet, page 2 of 2: 6. What gas is released by a leaf during photosynthesis?

    Page 2

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