Science 3rd grade | UNIT 5: Investigating materials 5.4 Testing materials
Activity 5.4a (Which material is best for an umbrella?)
You will need: some fabrics - paper - metal foil - a small funnel measuring cylinder - a timer
An umbrella needs to be waterproof.
Predict which material will be the most waterproof. The waterproof materials will not let the water through.
Look at the pictures to see what to do.
Write your results in a table.
What will you keep the same to make this test fair?
|
|
|
|
Look closely at the materials that are not waterproof Can you see why they are not waterproof?
Activity 5.4b (Which paper would make the strongest paper bag?)
You will need: thin pieces of different types of paper some masses - a strong plastic bag
Look at the pictures to see what to do.
Predict which paper will be strongest.
How will you make this a fair test?
 |
|
Write your results in a table.
Look closely at the strongest paper. Can you see why it is strong?
Questions
1) Why do the pieces of paper have to be the same size?
2) Is paper a good material for a bag? Why?