Science · Grades 2–5
Materials and useful properties
Choose a property that matters for a design task.
Learn the idea
Property
A property is an observable or measurable feature of a material.
Purpose
The useful property depends on the task; one material is not best for everything.
Compare
Use comparable sample size and test conditions.
Change
A material can change shape without necessarily becoming a different substance.
Worked examples
Which property matters most for a rain-cover material?
A rain cover should limit water entering.
Resistance to water passage.
Why compare equal-size strips in a simple strength comparison?
The comparison should control geometry.
Size can influence the result.
Check your understanding
Name two properties to consider for a carrying bag.
One sample has mass 12 g and another 19 g. How much heavier is the second?
Does bending a wire necessarily create a new chemical substance?
- Yes, every shape change does.
- No.
- Only if it is long.
Answers and marking notes
Answers and marking notes
- Strength and mass, or water resistance and flexibility.
Accept properties tied to the intended use.
- 7 g
19 − 12 = 7 g.
- No.
A shape change can be physical.
Independent educational review required. Grade bands are approximate; these are not officially aligned curricula.