Air around us

Q1. Which of the following is not a component of air? water vapour wood dust particles Q2. Which property of air can be explained through this picture? Air can be felt Air cannot be seen Air has weight Q3. The instrument used to indicate the direction of wind is called a- Windmill Wind vane Wind surf Q4. One way to keep the air clean is- planting trees burning things producing smoke Q5. Fill in the blanks. a) Air is a mixture of gases.b) The heat of the Sun changes the water into water vapour.c) Wind can turn the blades of a windmill.d) Plants keep the air fresh and clean. Why does an inflated ball weigh more than a deflated one? Why should we plant more trees? Define the following- Wind-Storm-Breeze-