EAPS 105: Asynchronous Quiz 12

Quiz 12: Unit 6. Part 4. Question 8. Watch the Unit 6 Part 4 lecture video and answer the following question: How many tracked near-Earth asteroids of significant size (≥ 10 m) have a significant chance (> 1/300) of hitting the Earth in the next several hundred years? A) 0 B) 1 C) 2 D) 5

A) 0

Quiz 12: Unit 6. Part 4. Question 5. Watch the Unit 6 Part 4 lecture video and answer the following question: Why is a lot of iridium evidence of an asteroid impact? A) Because asteroids have much more iridium than normally found on Earth's surface B) Because it is only created under extremely high temperatures and pressures C) Because it is only found on the surface of the Earth after being excavated from much deeper by an asteroid impact D) All of the above

A) Because asteroids have much more iridium than normally found on Earth's surface

Quiz 12: Unit 6. Part 4. Question 10. Watch the Unit 6 Part 4 lecture video and answer the following question: Which of these is not a potential strategy for changing the orbit of an asteroid on a collision course with Earth? A) Focus solar energy to create thrust from the resulting sublimation of ice B) Detonate a nuclear bomb on one side C) Land a spacecraft on it and turn on its engines to push it D) Attach a solar sail to the object

A) Focus solar energy to create thrust from the resulting sublimation of ice

Quiz 12: Unit 6. Part 3. Question 2. Watch the Unit 6 Part 3 lecture video and answer the following question: Why does the Kentland Crater in Indiana not look like an impact crater? A) Because it is overlain by corn fields B) Because the top of the crater was removed by glaciation C) Because it was destroyed by mining D) Because its topography is covered by a lake

B) Because the top of the crater was removed by glaciation

Quiz 12: Unit 6. Part 4. Question 9. Watch the Unit 6 Part 4 lecture video and answer the following question: What is our best strategy to avoid an extinction level size asteroid from hitting the Earth? A) Destroy it B) Deflect it C) Hide form it D) There is nothing we can do

B) Deflect it

Quiz 12: Unit 6. Part 3. Question 1. Watch the Unit 6 Part 3 lecture video and answer the following question: What are there more impact craters on the Moon compared to the Earth? A) The Moon is closer to the asteroid belt. B) The Moon has no erosional processes to remove impact craters. C)The Moon gets hit by asteroids more often than the Earth. D) The Earth has a larger mass.

B) The Moon has no erosional processes to remove impact craters.

Quiz 12: Unit 6. Part 4. Question 6. Watch the Unit 6 Part 4 lecture video and answer the following question: How was the Chicxulub Crater found? A) From radar data B) From photos from space C) From gravity data D) From sonar data

C)

Quiz 12: Unit 6. Part 4. Question 7. Watch the Unit 6 Part 4 lecture video and answer the following question: About how many Near-Earth Asteroids (NEAs) larger than 1 km in diameter are we currently tracking? A) 10 B) 100 C) 1000 D) 5000

C) 1000

Quiz 12: Unit 6. Part 4. Question 4. Watch the Unit 6 Part 4 lecture video and answer the following question: What percent of species on Earth died off at the Cretaceous-Paleogene extinction event? A) ~25% B) ~50% C) ~75% D) ~90%

C) ~75%

Quiz 12: Unit 6. Part 3. Question 3. Watch the Unit 6 Part 3 lecture video and answer the following question: Why is shocked quartz evidence of an asteroid impact? A) Because it shows signs of being melted B) Because it is completely shattered into small grains like sand C) Because it is fragments from an asteroid D) Because it shows evidence of the passage of a shock wave

D) Because it shows evidence of the passage of a shock wave