Question: What percent of the earth is covered with water?
Answer: More than 71 per cent of the earth is covered with water.
Question: What percent of earth is covered with land?
Answer: 29 per cent of earth is covered with land.
Question: How much of the earth’s water is found in the oceans?
Answer: More than 97 percent of the earth’s water is found in the ocean.
Question: Why is the ocean water not fit for human use?
Answer: It is because the ocean water is very salty.
Question: Why do the mountaineers carry with them oxygen cylinders?
Answer: The mountaineers carry with them oxygen cylinders so that they can easily breathe at high altitudes.
Question: What is the nature of the temperature?
Answer: The temperature decreases as we go upwards.
Question: Name the continents that surround the pacific ocean.
Answer: Asia, Australia, North America and South America.
Question: Which is the busiest ocean from the point of view of commerce?
Answer: The Atlantic ocean is the busiest ocean from the point of view of commerce.
Question: Mention two reasons of fast removal of soil from stops.
- Cutting of forests for wood.
- Clearing land for agriculture.
Question: What happened to Andaman and Nicobar islands during Tsunami?
Answer: Parts of these islands were submerged under water during Tsunami.
Question: What makes the water of lakes and rivers unsuitable for human use?
Answer: Discharge of waste material into lakes and rivers makes the water unsuitable for human use.
Question: Mention any two reasons of air pollution.
- Emission from industries
- Emission from vehicles.