Science

Question 1

1Rust is chemically

Hard

A. pure iron B. hydrated iron(III) oxide C. iron chloride D. iron sulphide

Question 2

2Which metal does NOT rust?

Easy

A. iron B. cast iron C. gold D. steel

Question 3

3A fire caused by electricity should not be put out with

Medium

A. a carbon dioxide extinguisher B. switching off the power first C. a dry powder extinguisher D. water

Question 4

4A change in which no new substance is formed is a

Easy

A. physical change B. combustion C. chemical change D. rusting

Question 5

5Melting butter is a chemical change.

Easy

A. True B. False

Question 6

6A change in which a new substance is formed is a

Easy

A. chemical change B. physical change C. reversible change always D. change of state only

Question 7

7Iron rusts faster near the sea.

Easy

A. True B. False

Question 8

8The three things needed for fire are fuel, heat and ___.

Easy

Your answer (fill in the blank)

Question 9

9Which is a chemical change?

Easy

A. dissolving sugar B. cutting paper C. melting ice D. burning firewood

Question 10

10Carbon monoxide is a harmless gas.

Easy

A. True B. False