Which comet hit Jupiter in 1994?
a. Comet Tempel 1
b. Comet Kohoutek
c. Comet Hale-Bopp
d. Comet Halley
e. Comet Shoemaker-Levy 9
Question 2
What do scientists believe to have caused the Tunguska event?
a. a comet
b. an iron asteroid
c. a stony-iron meteorite
d. a stony asteroid
e. a carbonaceous chondrite