What's new

Rivers – a quick quiz

By , 19 May 2021

This quiz is all about rivers. Let your knowledge flow and see how many questions you can get right!

#1. What’s the name for new land and islands that form at the mouth of a river?

A river delta is formed when sand, silt and other sediments collect at the mouth of a river. It’s called a delta because some deltas are shaped like a capital delta: Δ.

#2. The Todd River in Alice Springs is ephemeral, but what does ephemeral mean?

An ephemeral river only runs after rain. Most of the time it’s completely dry.

#3. When a river goes around a bend, where does it erode fastest?

Rivers erode fastest on the outside of a bend. Over time, this makes bendy rivers even bendier.

#4. All rivers in Australia flow into the ocean.

False. Rivers that flow into Kati Thanda–Lake Eyre never flow out again, because the lake is below sea level!

#5. There are rivers of liquid methane on Titan, but where is Titan?

Titan is the largest of Saturn’s moons. It has a thick atmosphere and has seas, rivers and rain made of methane.

Was I right?


Congratulations! You are a real science whiz!

Oh dear! Better brush up before the next quiz!

If you’re after more fun science for kids, subscribe to Double Helix magazine!


Black lightning bolt in purple circle


  1. I did it with my class first before doing this one that is why I got them all right.

  2. nice

  3. such a sophisticated answer


Leave a Reply

By posting a comment you are agreeing to the Double Helix commenting guidelines.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Double helix cover

Double Helix

If you're after more activities for kids sign up today!