Question

Q1. As the Sun shines on the surface of the Earth, it illuminates one half of the
Earth's surface. The other half is in darkness, or night. The dividing line between
day and night is known as the Terminator. The terminator line passes through any
given point on Earth two times a day, once during sunrise and again during
sunset. How fast does the terminator move? (1) Equal to the speed of Earth's rotation on its axis, (2) Equal to the speed of Earth's revolution around the sun (3) One rotation in 24 hours (4) One rotation in 365days.​

Answer 1

Explanation:

3) one rotation in 24 hrs

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Answer 2

The terminator moves one rotation in 24 hours. (Option 3)

• The terminator refers to a line on Earth that creates a distinction between the lit and dark sides of the planet.
• Since the earth rotates on its established axis, the terminator keeps on moving and takes 24 hours for one rotation.
• It can be viewed from the space and would have a blurry appearance.
• This line is also referred to as the twilight zone or the grey line.

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