Multiple Choice
Which of the following are evidence for an asteroid impact being the cause of the extinction of the dinosaurs 65 million years ago (as well as 75% of all species alive at the time) ?
A) a worldwide layer of the element iridium in 65 million year old rocks
B) no dinosaur fossils being present in rocks younger than 65 million years old
C) a buried crater more than 100 km across in the Gulf of Mexico
D) all of the above
Correct Answer:
Verified
Correct Answer:
Verified
Q16: Why do we sometimes observe asteroids at
Q19: Describe the Deep Impact and Stardust missions
Q22: Which of the following statements about comets
Q23: Pluto has 5 known moons.
Q24: Refer to the following scenario for the
Q25: What is Tunguska?<br>A)a postulated binary companion to
Q26: Why won't Pluto collide with Neptune?<br>A)Pluto orbits
Q43: All comets orbit the Sun in the
Q71: A spacecraft traveling through the asteroid belt
Q93: Why is the Kuiper belt flat but