Air Chapter Notes | Environmental Studies Class 2 ICSE PDF Download

Introduction

Air is something we cannot see, but it is all around us. We need air to live, and it helps us in many ways. When air moves, it becomes wind, and wind can be soft or strong. In this chapter, we learn about air, how it moves, and why it is important for us. We also find out how air can help us and why we should keep it clean.

Air

• Air is everywhere around us.
• We cannot see air, but we can feel it when it moves.
• When air moves, we call it wind.
• If air moves softly, we call it a breeze.
• If air moves very fast, we call it a storm.

Air Has Speed

• Wind can be strong or slow.
• Strong wind moves very fast and has a lot of speed.
• Fast wind can move things like kites, balloons, and smoke.

Fun Fact

Very strong wind is called a gale.

Air Has Direction

• Air always moves in a direction.
• We can see the direction of air by looking at things like tree branches, kites, or smoke from chimneys.
• If we stand in a windy place, our clothes will move in the direction of the wind.

Air Has Force

• Moving air has a lot of power.
• A storm is very strong and can pull out trees from the ground.
• A storm can also blow away the roofs of weak houses.

Air Is Useful

Wind helps us in many ways:

• Wind moves the blades of a windmill.
• A windmill makes electricity and pulls water from wells.
• Wind helps a hot air balloon go up in the sky and fly.
• Wind carries the seeds of trees to far places.
• Later, these seeds grow into new plants.
• Wind helps clothes dry faster when we hang them outside.
• Wind helps kites fly high in the sky.

Clean Air

• We need to breathe clean air to stay healthy.
• Dirty air can make us sick.
• Dirty air comes from smoke made by vehicles, factories, and crackers.
• If we breathe impure or dirty air, we can fall ill.
• We should grow more plants around us to keep the air clean.