Science Fair Projects
biologymedium elementary 14 days

Leaf Color Changes in Different Light Conditions

This project investigates how leaf color changes when exposed to different light conditions. Students will use leaves from the same plant and place them under varied lighting to observe changes.

Leaf Color Changes in Different Light Conditions

Hypothesis

If leaves are exposed to different light conditions, then the color of the leaves will change depending on the type of light.

Materials Needed

Potted plant with green leaves — 1Buy
Sunlight lamp — 1Buy
LED lamp — 1Buy
Dark cardboard box — 1Buy
Ruler — 1Buy
Camera or smartphone — 1Buy
Notebook — 1Buy

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Step-by-Step Procedure

  1. 1

    Select a plant with healthy green leaves.

  2. 2

    Place the plant in a location with sunlight.

  3. 3

    Cover part of the plant with a box to create a dark environment.

  4. 4

    Place other parts under an LED lamp and sunlight lamp.

  5. 5

    Document the initial color of the leaves.

  6. 6

    Observe and record changes daily over two weeks.

  7. 7

    Photograph the leaves frequently to track changes.

  8. 8

    Note any color changes for each light condition.

  9. 9

    Measure the intensity of each light source.

  10. 10

    Compare and analyze the results.

Expected Results

Leaves exposed to different light conditions will show varying degrees of color change. Those in the dark might fade, while others could remain green or change shades.

Variables

Independent Variable

Type of light exposure

Dependent Variable

Color of leaves

Controlled Variables

Type of plant, Initial leaf color, Watering schedule

Safety Notes

Handle all lamps carefully to prevent burns or electrical hazards.

Presentation Tips

  • Use clear photos to show leaf color changes.

  • Prepare a chart to illustrate the timeline of changes.

  • Discuss the importance of light in photosynthesis.

Frequently Asked Questions

Why do leaves change color?

Leaves change color due to changes in chlorophyll as light conditions vary.

What is the role of chlorophyll?

Chlorophyll is a pigment in leaves that helps plants absorb light for photosynthesis.

How does light affect plants?

Light provides the energy plants need to produce food through photosynthesis.

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