Online Test — Matter & Mixtures
10 Questions • 12 min • Chapter MCQ
12:00
Question 1 of 10
easy
A simple way to kill germs in water at home is to…
Boil it
Freeze it
Shake it
Colour it
Explanation: Boiling water kills most germs.
Question 2 of 10
medium
Light husks can be separated from heavier grain by letting the wind blow them away. This is called…
Boiling
Filtering
Winnowing
Magnetising
Explanation: Winnowing uses wind to remove light husks.
Question 3 of 10
medium
A mixture of sand and iron filings can be made just by…
Heating to melt
Mixing them together
A chemical reaction
Burning
Explanation: Just mixing makes a simple mixture.
Question 4 of 10
easy
We can get salt back from salty water by…
Filtering
Evaporating the water
Using a magnet
Freezing
Explanation: Evaporation leaves the salt behind.
Question 5 of 10
easy
A substance that dissolves is said to be…
Insoluble
Soluble
Frozen
Hard
Explanation: Things that dissolve are soluble.
Question 6 of 10
easy
Water that is safe and clean to drink is called…
Sea water
Muddy water
Pure (potable) water
Drain water
Explanation: Clean, safe water is pure or potable water.
Question 7 of 10
easy
In which state are particles packed most tightly together?
Gas
Liquid
Solid
Steam
Explanation: Solids have the most tightly packed particles.
Question 8 of 10
hard
A solution looks clear because the dissolved particles are…
Very big
Too tiny to see
Floating on top
Made of glass
Explanation: Dissolved particles are too small to see, so the solution looks clear.
Question 9 of 10
easy
Which of these is a mixture?
A single grain of sugar
Pure water
Salad of many vegetables
Pure gold
Explanation: A salad is a mixture of different things.
Question 10 of 10
medium
Heating a solid enough can change it into a…
Liquid
Gas at once
Rock
Star
Explanation: Enough heat melts a solid into a liquid.