Question: What is the atmosphere?
Answer: Air is a layer around the earth. This layer is called the earth’s atmosphere.
Question: Name the various layers of the atmosphere.
Answer: The various layers of the atmosphere are:
Question: How does the atmosphere protect us from meteoroid hits?
Answer: The atmosphere protects us from meteoroid hits by burning them up in the mesosphere before they can hit the surface of the earth.
Question: What is air pressure.
Answer: The weight of air pushes everything around it in all directions is called air pressure.
Question: Name any three impurities that make unfit for use.
Answer: The three impurities that make unfit for use are:
Question: The two types of impurities in water? Give examples.
Answer: The two types of impurities in water are:
- Impurities that dissolve in water are called soluble impurities.
- Eg: salt, sugar.
- Impurities that do not dissolve in water are called insoluble impurities.
- Eg: sand, mud.