A meteor is

1. a rapidly moving star
2. a piece of matter which has entered the earth’s atmosphere from outer space
3. part of a constellation
4. a comet without a tail

Explanation

Option (b) is correct

• A meteor is a small rocky or metallic body (meteoroid) that enters the Earth’s atmosphere from outer space. Due to friction with atmospheric gases, it burns and produces a streak of light commonly called a “shooting star.

Answer: (b) a piece of matter which has entered the earth’s atmosphere from outer space