Why is the sky blue?
Sunlight looks white, but it hides every colour of the rainbow. Find out why the air sends the blue part to your eyes, and why sunsets turn orange.
Ranki explainsAges 6+4 min
5 questions
Nature & Weather
Nature is full of questions. Why is the sky blue? Where does rain come from? Why do volcanoes erupt? Put on your boots, we are going outside.
How is a rainbow made?
All you need is sunshine, raindrops and the Sun at your back. Find out how tiny drops of water split white light into a bow of bright colours.
Tanki explainsAges 6+4 min
Where does rain come from?
Rain is very old water on a trip that never ends. Follow a drop from a puddle up into the clouds and back down again, and see what the Sun has to do with it.
Ranki explainsAges 6+5 min
Why do volcanoes erupt?
Deep under your feet, some rock is so hot that it melts. Find out how gas and pressure push it up until a volcano erupts, and how scientists keep people safe.
Tanki explainsAges 8+5 min
How do plants make their own food?
Plants never go shopping or hunting, yet they grow all day long. Find out how leaves turn sunlight, water and air into food, and give us oxygen as a gift.
Ranki explainsAges 8+4 min
Keep exploring