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Photosynthesis Leaf Model Worksheet

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Photosynthesis Leaf Model Worksheet

Alex and Hemi are building a model to explain how a leafy plant makes food. Use the information and visuals on this sheet to trace the materials, label the leaf model and explain what happens when conditions change. Answer in your own words where asked.

Follow the materials

Photosynthesis happens mainly in leaf cells. Chlorophyll in chloroplasts absorbs light energy. The plant takes in carbon dioxide from the air through tiny openings in the leaf. Water is transported from the roots. Using light energy, the plant makes glucose and releases oxygen. Glucose can be used for energy or building materials, or stored. Oxygen can leave the leaf and enter the air.

1.Sort these photosynthesis inputs and outputs (including energy): sunlight, water, carbon dioxide, glucose and oxygen. Which three are inputs, and which two are outputs?
2.Which input comes from the air, and which input is transported from the roots to the leaf?
3.Choose the best explanation of chloroplasts in photosynthesis.
  • They absorb light energy using chlorophyll.
  • They carry water up from the roots.
  • They release glucose into the air.
  • They turn oxygen into carbon dioxide.

Build and read a leaf model

In the model, arrows show the direction materials move. Sunlight provides energy; it is not a material that travels through the plant in the same way as water or gases.

Draw a large leaf outline with a central vein. Add arrows and labels for sunlight, carbon dioxide, water, glucose, oxygen and chloroplasts. Show which materials enter and leave the leaf. Add a note explaining one arrow.
4.Hemi says, “Glucose is food the plant gets from the soil.” Correct her explanation using the photosynthesis model.
5.Alex covers a plant’s leaves so they receive no light. Predict what happens to photosynthesis and explain why.
6.A plant has plenty of light and carbon dioxide but its roots cannot take up water. What happens to photosynthesis? Explain.
7.True or false: Oxygen is an input that the plant uses to make glucose during photosynthesis.
TrueFalse
8.Complete the word equation: carbon dioxide + water + light energy → + .
9.Name one feature of a leaf that helps photosynthesis, and explain how it helps.

3 printable pages

  • Photosynthesis Leaf Model Worksheet, page 1 of 3: Follow the materials

    Page 1

  • Photosynthesis Leaf Model Worksheet, page 2 of 3: Build and read a leaf model

    Page 2

  • Photosynthesis Leaf Model Worksheet, page 3 of 3: 8. Complete the word equation: carbon dioxide + water + light energy → +

    Page 3

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