Sink or Float: Science Experiment

Sink or float introduces the scientific method in an accessible, hands-on way. Children make predictions, test, and revise their thinking.

• Framework: Montessori
• Unit: Cultural Studies
• Learning area: Science
• Level: Ages 3-5

Objectives

• Make predictions and test them
• Understand buoyancy basics
• Practice scientific method
• Record experimental results

Materials

• Large clear container of water
• Objects to test (cork, coin, feather, marble, sponge, leaf, key, crayon)
• Prediction chart
• Pencil

Instructions

1. Present objects on tray. 2. Hold up first object: 'Will it sink or float?' 3. Record prediction on chart. 4. Gently place in water. 5. Observe: sink or float? 6. Record result. 7. Compare prediction to result. 8. Test remaining objects. 9. Discuss: 'What do floating objects have in common?'

Educator tip

Don't correct wrong predictions—the surprise when predictions are wrong is the best learning! Encourage children to revise their thinking.

Assessment

Child makes predictions, tests, and records results for multiple objects.

More from Cultural Studies

• Parts of a Flower: Botany Puzzle
• World Music and Cultural Dance
• Magnetic and Non-Magnetic Sorting
• Life Cycle of a Butterfly
• Land and Water Forms: Globe Work
• Seasons and Weather Observation
• Art Appreciation: Famous Artists Study
• Seed Dissection and Observation