Air and Weather
Map
Arrows point from what you learn first to what it opens. Point at a concept to light up its chain and where it comes back deeper. Right-click a concept (or press and hold it) for its lessons and stories.
- Proven to depth123
- Open
- Locked
- Comes back deeper
Learning path
In the order the concepts build on each other.
- Air pollutionReadyClean air is clear and has no bad smell, so you can see faraway mountains through it. Smoke and dust from cars, factories and burning rubbish make the air polluted: it turns the sky grey, stings the eyes and makes people cough, and it harms animals and plants too. Walking, taking the bus, planting trees and never burning rubbish keep the air cleaner, and on a very smoggy day it is best to stay indoors.
- WindReadyWind is moving air. It blows from a direction, gently or strongly: a weather vane shows where it comes from and a pinwheel how hard it blows. Very strong wind is a storm, which can break trees and make huge waves at sea. Wind carries sand and builds dunes, and people use it to sail boats, turn windmills and make electricity.