1. When iron rusts, it produces a material that is *

A. Hard
B. Light
C. Strong
D. Weak

2. Which of the following is a product of combining iron and oxygen? *

A. Diamond
B. Nail
C. Rust
D. Wood

3. Which of the following situation shows that materials change in composition? *

A. Freezing of ice
B. Rusting of a steel wool
C. Cutting a piece of wood
D. melting ice cream under the sun

4. In which condition will rust occur? *

A. Near the shore
B. Under the heat of the sun
C. Away from the shore
D. In a cool dry place

5.Which is true about change in materials when burned? *

A. A new material is formed.
B. The product can be restored to its original form.
C. The new product becomes smooth and shiny.
D. The new material is lost.​