Types of rock
6 free practice questions with explanations
PassNova has 6 free Kids Rocks & Soil practice questions on Types of rock, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Types of rock: example questions & answers
6 worked examples with answers and explanations below. Practise them in the browser with instant feedback on every answer.
Which of these is a hard, strong rock often used to build houses and walls?
- AJelly
- BGranite✓
- CCotton wool
- DSponge
Answer: Granite is a very hard rock that builders use because it is so strong.
Which soft rock is white and can be used to write on a chalkboard?
- AChalk✓
- BSteel
- CGlass
- DPlastic
Answer: Chalk is a soft white rock that crumbles easily, so it is good for writing.
How does a rock usually feel compared to a sponge?
- AWet and slimy
- BSoft and squishy
- CFluffy and light
- DHard and solid✓
Answer: Most rocks are hard and solid, unlike a soft, squishy sponge.
Which shiny black rock, formed from cooled lava, has smooth glassy edges?
- ASand
- BChalk
- CObsidian✓
- DClay
Answer: Obsidian forms when very hot lava cools quickly, making a shiny, glassy rock.
Marble is a smooth, pretty rock that is often used to make what?
- AStatues and floors✓
- BCakes and pies
- CBalloons
- DClouds and rain
Answer: Marble is a beautiful rock often carved into statues or used for shiny floors.
Are all rocks exactly the same as each other?
- AYes, they are all soft
- BYes, they are all identical
- CYes, they are all white
- DNo, there are many different kinds✓
Answer: There are lots of different rocks, with different colours, textures, and hardness.