Air around Us Chapter Notes | Science Class 2 ICSE PDF Download

Introduction

Air Has Direction

• Wind always blows in a specific direction.
• The direction of wind can be seen in the movement of tree branches or smoke from chimneys.
• An instrument called a wind vane is used to tell the direction of the wind.
• If you stand in a windy place, the direction your clothes move shows the wind's direction.

Air Has Speed

• Strong wind moves at a very high speed.
• Fast-moving wind can change the direction of objects like kites, balloons, and smoke.

Air Has Force

• Moving air has a lot of force.
• Wind can blow away everything in its path.
• A strong storm can uproot trees and damage kutcha houses.

Air is Useful

• Wind helps yachts sail on water.
• Wind helps clothes dry faster.
• Wind helps aeroplanes and other objects fly.
• Wind moves the blades of a windmill, which produces electricity and draws water from wells.
• Wind helps hot air balloons rise and fly.
• Wind carries plant seeds to far places, where they grow into new plants.
• Air is used to play musical instruments like flutes, trumpets, and mouth organs.

Clean Air

• Air becomes dirty due to dust and harmful gases.
• Harmful gases come from vehicle smoke, factory smoke, and crackers.
• Breathing clean air is important to stay healthy.
• Breathing dirty air can make us sick.
• Plants help keep the air fresh and clean.
• We should grow more plants to maintain healthy air.