Answer the following questions in short1. Define matter.2. State why solids are hard.3. Mention three properties of air.4. What do you understand by expansion of ar?5. State any three uses of air.6. Which gas is essential for burning?7 How do vehicles contribute to air pollution?the following questione

Answer the following questions in short1. Define matter.2. State why s

1.	Answer the following questions in short1. Define matter.2. State why solids are hard.3. Mention three properties of air.4. What do you understand by expansion of ar?5. State any three uses of air.6. Which gas is essential for burning?7 How do vehicles contribute to air pollution?the following questione
Answer» anything that OCCUPIES space and has mass because the molecules are tightly packed they can flow , they can be COMPRESSED and they have lest intermolecular force of attraction gasses expands on heating breathing , respirations and climate change oxygen the vehicle use FULE and burn it which produce a HARMFUL gas which leds to air pollution

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