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Shadow Investigation Worksheet

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Shadow Investigation Worksheet

A class is testing how the distance between a torch and an object affects shadow length. Read the investigation notes and results, then use the evidence to answer the questions. Never look directly into a torch. Keep electrical equipment away from water and walk carefully around the setup.

Investigation notes and results

Anh placed the toy tree 30 cm from the screen. She measured the shadow from the base of the tree to the tip. She moved the torch to different distances from the tree, keeping the tree and screen in the same places. Each measurement was repeated three times, then averaged.

Torch-to-tree distance

Average shadow length

10 cm

42 cm

20 cm

30 cm

23 cm

Plan and interpret

Think like a scientist: identify what changed, what was measured and what should stay the same.

1.What question was Anh investigating about the torch and the toy tree?

2.Choose the independent variable—the factor Anh deliberately changed.

The distance from the torch to the toy tree
The length of the shadow
The distance from the tree to the screen
The colour of the screen

3.What was the dependent variable—the result Anh measured?

4.Name one factor Anh kept the same to make the test fair.

5.True or false? Anh repeated each measurement three times and used the average.

TrueFalse

6.At which torch-to-tree distance was the shadow longest? Include the shadow length as evidence.

7.What pattern do the results show as the torch moves farther from the tree?

8.The shadow was 42 cm at a torch distance of 10 cm and 30 cm at a torch distance of 20 cm. How many centimetres shorter was the shadow at 20 cm?

9.Draw a simple labelled diagram of how a shadow forms. Show a light source, an object blocking the light, and the shadow on a screen.

10.Which safety action is best when using a torch for this investigation?

Point the torch towards a classmate’s eyes
Keep the torch away from water and point it at the object
Leave cables across a walkway
Cover the torch while it is switched on

11.Suggest one improvement or follow-up test that could make Anh’s investigation stronger. Explain what you would change or test.

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Shadow Investigation Worksheet

Shadow Investigation Worksheet

Investigation notes and results

Plan and interpret

3 printable pages

About This Worksheet

Free in Kuraplan

Print-Ready

AI-Generated

For Teachers & Parents

Need a custom version of this worksheet?

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