Can You Trust Your Eyes? Optical Illusions to Predict, Measure and Explain
Children predict which line or circle looks bigger, then measure with a ruler in millimetres and find the truth. Three illusions (arrow lines, circle rings and slanted dashes) show that first impressions can mislead. A final question asks them to choose the best explanation.
Part of the pack
Critical Thinking Worksheets for Ages 9-10: Mastermind Academy Logic Puzzle Pack
This is page 15 of the pack. Ages 9-10
About this worksheet
- Topic:
- Optical illusions and measuring
- Skill:
- Measurement Basics (Measurement - Length): Compare objects by height, thickness, and size.
- Pack:
- Page 15 of 24 in Critical Thinking Worksheets for Ages 9-10: Mastermind Academy Logic Puzzle Pack.
How to use this worksheet
Make a prediction first. Then measure carefully with a ruler in mm and compare. Test a grown-up before telling them the answer, and tick the best explanation at the end.
Materials needed
- Ruler (mm)
- Pencil
Extension activities
- 1Show a grown-up illusion 1 and see if they are fooled.
- 2Search the house for other things that can trick the eyes.
Written by
Hemsweta Jain · Teacher Cheena
MBA and Early Childhood Educator, teaching since 2014 · Founder of RaisoActive, Mumbai
Every RaisoActive worksheet is designed and checked by the founder before publishing.
Published · Last reviewed
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