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Sink or Float Investigation

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Sink or Float Investigation

Name:

Date:

Objects floating and sinking in water

🔬 Part 1: Planning Your Investigation

1. Group Members:

Name 1: _________________ Name 2: _________________ Name 3: _________________

2. Our Investigation Question:

Complete this sentence: "Which objects will _______ and which objects will _______?"

3. Choose 5 objects to test from your classroom. Circle your choices:

Paperclip

Cork

Plastic toy

Stone

Wooden block

Metal spoon

Rubber ball

Other: _____________

4. Make your predictions. Will each object sink or float?

Object 1: _____________ will _______ because _________________________

Object 2: _____________ will _______ because _________________________

Object 3: _____________ will _______ because _________________________

Object 4: _____________ will _______ because _________________________

Object 5: _____________ will _______ because _________________________

5. Success Criteria - How will you make this a fair test? Tick the rules you will follow:

Use the same amount of water for each test

Drop objects gently into the water

Record results accurately

Take turns fairly in the group

Keep the water clean between tests

📊 Part 2: Recording Your Results

6. Complete this results table as you test each object:

Object	My Prediction	What Actually Happened	Correct? ✓ or ✗
1. ___________	___________	___________	___________
2. ___________	___________	___________	___________
3. ___________	___________	___________	___________
4. ___________	___________	___________	___________
5. ___________	___________	___________	___________

7. What patterns do you notice? Complete these sentences:

Most objects that floated were made of: _________________________________

Most objects that sank were made of: ___________________________________

The most surprising result was: ______________________________________

🎯 Part 3: Explaining Your Findings

8. Why do you think some objects sink and others float? Use these sentence starters:

I think objects sink when they are _________________________________

I think objects float when they are _________________________________

The material an object is made from is important because _______________

_________________________________________________________________

9. Extension Challenge: What other variables could you test? Circle your ideas:

Test the same object in different liquids (salty water, oil)

Test different sizes of the same material

Test objects with different shapes but same material

Test what happens when you change an object's shape

10. Prepare for your group presentation. Plan what each person will say:

Introduction: Our question was _____________________________

Method: We tested ______________________________________

Results: We found that ___________________________________

Conclusion: This happened because ________________________

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