Air Around Us Class 1 Notes Science

What is Air?

Air is the natural resource of the environment. Air is all around us. You can't see it, but you can feel it when it moves. It's like a friendly hug from nature.

What are the Uses of Air?

• We breathe in air to stay alive. Imagine your lungs are like balloons. When you breathe in, your lungs fill up with air. When you breathe out, you release the used air.

• Air loves to play games! It makes things move. Have you ever flown a kite? It's the air that helps it soar high in the sky.

• It is filled up with balloons, tires, and swimming tubes.
  
  Swimming Tubes have air-filled up inside them.
• It helps to dry clothes.

Air helps to dry clothes

• It helps to move sailboats and windmills.
  
  Air helps to move sailboats
• It makes the fire burn.
  
  Air helps in burning

Try this Activity!

• Blow air into an empty balloon.
  
  Ballon increases in size, when air is blown into it.
• The balloon would increase in size when air is blown into it as the air has entered inside the balloon. 
• The same air when squeezed out of the balloon can be felt on hand decreasing the size of the balloon.
  
   Balloon size is squeezed when air is blown out from it.

Properties of Air

1. Air is Invisible

• We can feel air all around us. It cannot be seen or touched. It has no taste or smell. 
• We can feel air when we stand in front of a working table fan.
   
  Air can be felt in front of a table fan
• When air moves very fast it is called wind. Wind can move things with it.

Fun Fact: Did you know that the air is made up of different gases, like oxygen and nitrogen? These gases are like the special ingredients that make air so good for us!

2. Air has Weight

• Two identical balloons are taken and one of them is filled with air. Both the balloons are weighed separately. 
• The balloon with air has more weight. This shows that air has weight.
  
  The balloon filled with air is heavier than an empty balloon.

3. Air Occupies Space

• A balloon is taken and air is blown into it so that it becomes bigger in size. 
• This is because air has occupied space.

The balloon becomes bigger in size when air is blown in it.

Why is air very important for all of us?

• We need air to live and breathe. 
• Plants and animals also need air for life. 
• If a plant is kept inside a closed jar, it is observed that it dies due to the absence of air. 
• Animals also die without air. Air is also required for burning.

Amazing Facts

• We need oxygen gas to breathe.
• You would not be able to blow out your birthday candles if there was no air.
• The power of the wind is used to produce electricity. This is done with the help of a windmill.
  
  Windmill
• Balloons, airplanes, kites, and windmills need air to work.