Understanding Air in Water

The video explains that water contains dissolved air, which is crucial for aquatic animals as they require oxygen for respiration. A demonstration is conducted using a beaker, tripod stand, and Bunsen burner to show that heating water causes air to escape, forming bubbles. This process illustrates that water has air dissolved in it, which serves as an oxygen source for underwater animals.

Why do animals living in water need air?

• For shelter

• For food

• For respiration

• For swimming

What is the purpose of heating the beaker in the experiment?

• To cook the water

• To observe the color change

• To demonstrate air escaping from water

• To freeze the water

What forms in the water when it is initially heated?

• Smoke

• Steam

• Bubbles

• Ice

What happens to water when it reaches boiling point?

• It becomes solid

• It changes color

• It turns into ice

• It evaporates into water vapor

How do aquatic animals benefit from the air in water?

• It keeps them warm

• It provides them with food

• It gives them shelter

• It helps them breathe