Question

per hours.
16. Which of the following is not an environmental crisis
A) Global warming
B) Air pollution
C) Collision of asteroids
D) The rise of water levels in oceans.
7. Earth travels around the sun at speed of
[ ]
A) 1,07,200 kms B) 6200 kms
C) 152 million km D) 1,02,700 kms
The earth began to form around
years ago
1
A) 137 billion B) 107, 200
C) 472 billion
D) 6 billion
Which of the following came into existence first
U ]
A) Human beings B) Plants
C) Animals
D) Ocean species
We can locate places on the earth with the help of
A) Latitudes B) Longitudes C) Grid
D) Equator​

Answer 1

Answer:

1. Collision of asteroids
2. 1,02,700
3. 6 billion
4. Ocean species

5. both a and b option.

Mark as brainlist.

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Explanation:

Answer 2

Answer:

1. Which of the following is not an environmental crisis?

Ans. Collision of asteroids.

2.  Earth travels around the sun at speed of -

Ans. 1,07,200 kms.

3. The earth began to form around ......... years ago .

Ans.6 billion.

4. Which of the following came into existence first?

Ans.  Ocean species.

5. We can locate places on the earth with the help of -

Ans. Grid.

Explanation:

1. Besides collision of asteroids, global warming, air pollution and the rise of water levels in oceans are the results of environmental crisis. Only the collision of asteroids has nothing to do with environment, it is purely a matter of space.

2. Earth's average orbital speed is about 30 kilometres per second. In other units, its about 19 miles per second or 67000 miles per hour or 1,10,000 kilometres per hour. So the closest is 1,07,200 kilometres per hour. Though the actual speed is 1,09,927 kilometres per hour.

3. The earth began to form around four and a half billion years ago. But this is not given in the option. So the nearest is six billion years ago.

4. When the earth cooled down, species of ocean were the first to come into existence.

5. We van locate any places on earth by the grid lines made by both latitude and longitude.