Question

E. Answer these.
1. What are asteroids?
2. What are shooting stars?
3. Give three reasons why there is life on the earth.
4. Why is the sun important for life on the earth? *
5. How does the atmosphere act as a blanket and a shield?
6. Why is water important for us?​

Answer 1

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1) A small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter, though some have more eccentric orbits.

2) The sand-sized grains of dust sometimes slam into the thin air that surrounds the Earth, called the atmosphere, where they get hot very quickly. As the dust grains burn up, they leave bright streaks of light across the night sky. These streaks are called meteors, often nicknamed 'shooting stars' or 'falling stars'.

3) Reasons :-

• Earth has a breathable atmosphere.
• Climate. Earth has a suitable climate.
• Water. Earth has water!

4) It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. Plants need sunlight to grow. Animals, including humans, need plants for food and the oxygen they produce. Without heat from the sun, Earth would freeze.

5) The atmosphere mainly contains air which is a bad conductor of heat.The atmosphere prevents the sudden increase in temperature during the daylight hours and during the night, it slows down the escape of heat into the outer space. In this way, atmosphere acts as a blanket.

6) Water carries nutrients to all cells in our body and oxygen to our brain. Water allows the body to absorb and assimilate minerals, vitamins, amino acids, glucose and other substances. Water flushes out toxins and waste. Water helps to regulate body temperature.

Answer 2

Answer:

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Reasons :-

Reasons :-Earth has a breathable atmosphere.

Reasons :-Earth has a breathable atmosphere.Climate. Earth has a suitable climate.

Reasons :-Earth has a breathable atmosphere.Climate. Earth has a suitable climate.Water. Earth has water!

4) It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth.

4) It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. 5) The atmosphere mainly contains air which is a bad conductor of heat.

4) It radiates light and heat, or solar energy, which makes it possible for life to exist on Earth. 5) The atmosphere mainly contains air which is a bad conductor of heat.6) Water carries nutrients to all cells in our body and oxygen to our brain.