1. A typhoon is a ______.
A. Cold air mass that moves along the polar region.
B. High pressure area with winds blowing at about 60kph.
C. Low pressure area with winds blowing at about 118kph to 220kph.
D. Warm air mass that moves at the equator.
2. A meteor is a ______.
A. Piece of the Sun heading for Earth.
B. Star moving quickly across the sky.
C. Piece of space rock burning up in Earth's atmosphere.
D. Comet entering the earth.
3. A meteor shower occurs when ______.
A. a meteor is about to get married.
B. the earth passes through the asteroid belt.
C. the head of a comet hits the earth's atmosphere.
D. the earth passes through a swarm of dust particles in space, the remnants of a comet, once a year.