On average, how often does a six-meter diameter asteroid collide with Earth?
A) once a year
B) once every five years
C) once every ten years
D) once every fifty years
E) once every century
Correct Answer:
Verified
Q1: What are comets made of?
A)high-magnesium and -iron
Q3: Why would astronomers have difficulty spotting a
Q4: About how many asteroids larger than 1
Q5: How fast do comets travel?
A)about 2 to
Q6: What are shatter cones?
A)funnel-shaped cones of rock
Q7: How many times in the last century
Q8: What causes an asteroid to drop out
Q9: Approximately how long ago did the Chesapeake
Q10: Asteroid 2004 MN4 (Asteroid Apophis) was expected
Q11: Most asteroids originate from an asteroid belt
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