Mystery Bag Investigation

Name:

Date:

🔍 Part 1: Observation and Classification

1. Your teacher has given you a mystery bag containing an unknown object. Without looking inside, what properties can you investigate to identify the object?

Mass (weight)

Texture

Shape

Colour

Sound when shaken

Temperature

2. You feel a smooth, hard object that is approximately 8 cm long and cylindrical. It makes no sound when shaken. What type of material is this most likely to be?

Metal

Plastic

Wood

Fabric

3. Your mystery object has a mass of 15 grams and feels rough with small bumps. When shaken, it makes a rattling sound. Which property gives you the most useful information for identification?

The mass

The rough texture

The rattling sound

All properties are equally important

4. Based on the clues in question 3, what do you think the mystery object might be?

🧪 Part 2: Scientific Investigation

5. Design a step-by-step investigation to identify your mystery object. List 4 steps you would follow:

Step 1: _________________________________________________

Step 2: _________________________________________________

Step 3: _________________________________________________

Step 4: _________________________________________________

6. Record your observations in the table below by feeling your mystery bag (do not look inside!):

Shape: _________________________

Size (estimate in cm): _____________

Texture: _______________________

Hardness/Softness: ______________

Sound when moved: _______________

7. Based on your observations, write a hypothesis about what your mystery object is and explain your reasoning:

My hypothesis: The object is a ______________________ because ________________________________________________________________________________________________________________________________

8. Now reveal your mystery object! Was your hypothesis correct?

Yes, completely correct

Partially correct

No, completely wrong