Coral & seaweed
6 free practice questions with explanations
PassNova has 6 free Kids Sea Life practice questions on Coral & seaweed, each with a clear explanation. Practise them in the browser with instant feedback — 100% free, no sign-up, on any device. Updated for 2026.
Coral & seaweed: example questions & answers
6 worked examples with answers and explanations below. Practise them in the browser with instant feedback on every answer.
What is a coral reef mostly made of?
- APlastic rubbish that has washed in from the beach
- BBig blocks of ice frozen together
- CLots of tiny living animals called coral polyps✓
- DSmooth rocks painted in bright colours
Answer: A coral reef is built by millions of tiny animals called polyps that live together.
What is the long, leafy living thing that grows in the sea and washes up on beaches called?
- AIvy
- BGrass
- CMoss from trees
- DSeaweed✓
Answer: Seaweed is a plant-like living thing that grows in the sea and sometimes washes ashore.
Why are coral reefs important for sea life?
- AThey give many fish and creatures a home✓
- BThey keep the water warm all through the night
- CThey give ships a safe place to park at night
- DThey light up the night sky above the sea
Answer: Coral reefs are like busy underwater cities where lots of sea animals live and hide.
What does seaweed need to help it grow?
- ATorchlight only
- BSunlight✓
- CLoud music
- DSweet fizzy drinks
Answer: Like plants on land, seaweed uses sunlight to help it grow.
Corals come in many bright what?
- ASounds
- BSmells
- CFlavours
- DColours✓
Answer: Coral reefs can be beautiful colours like pink, orange, purple and blue.
Which little sea creature likes to hide among the swaying sea plants and coral?
- AA seahorse✓
- BA sheep
- CA polar bear
- DA parrot
Answer: A seahorse curls its tail around sea plants to hold on and hide from danger.