Question

how the earth was made: asteroids video questions
how the earth was made: asteroids is the story of the discovery that earth has been struck by giant rocks from space called asteroids. places such as meteor crater in arizona, and sudbury in canada, display compelling evidence of impact origin. asteroids still present a danger to earth, yet they have also revealed the age of the solar system and may have delivered the raw material of life to the early earth. select the correct multiple - choice response for each question. after the video, write the letter for each answer in the blank at the beginning of each question. the questions follow the same order as the information presented in the video

1. according to the narrator, what could fit inside of the 3/4 mi wide, 550 - ft. deep crater lying 35 mi east of flagstaff, arizona? a) statue of liberty b) washington monument c) empire state building
2. although later favoring a volcanic origin (a steam explosion called a maar), what had led grove gilbert, chief geologist of the us geological survey, to speculate that an asteroid impact might have formed the mysterious arizona crater? a) observing the moon through his telescope b) an h.g. wells novel c) a meteorite
3. what was unusual about the small rocks (meteorites) found near the arizona crater? a) they were almost pure iron b) they were nearly pulverized into fine powder c) they were fashioned into characteristic stone points
4. even without an iron mass, what other impact evidence did daniel barringer identify? a) shatter cones b) fine pulverized rock c) meteoritic chondrules
5. at the nevada nuclear test site, what did eugene shoemaker discover to be similar to meteor crater? a) finely pulverized rock b) small meteorites c) overturned rock beds
6. sandstone at meteor crater and the nevada test site appeared a) traumatized. b) shocked. c) stunned
7. thermoluminescence dated meteor crater at. a) 4.567 billion yrs. b) 2 billion yrs. c) 50,000 yrs.
8. the 300,000 - ton body that created meteor crater was likely a) shocked. b) vaporized. c) an airburst.
9. at over 35 times the speed of sound, the meteorite had entered the atmosphere at a speed of ___ mph. a) 767 b) 1535 c) 25,000
10. the energy that created the crater was likely a few hundred to a thousand times greater than the energy that a) destroyed hiroshima & nagasaki. b) creates a volcanic eruption. c) is released by the sun every second.
11. which deformed rocks, featuring linear fractures that focus down to a point, are found at sudbury? a) shatter cones b) glacial striations c) foliated gneiss
12. according to the narrator, what do all space rocks have in common? a) silica composition b) organic compounds c) large amounts of indium
13. which incredibly accurate device is used to determine the composition of sudbury rocks? a) geiger counter b) mass spectrometer c) laser interferometer
14. the sudbury rocks contained ___ times more iridium than control samples a) 10 b) 50 c) 1,000
15. what likely wore down sudburys impact crater? a) early mining operations b) erosion c) volcanic activity
16. at 155 mi in diameter, sudbury is earths 2nd largest impact site. dr. spray calculated that it formed almost a) 4.567 billion yrs. ago. b) 2 billion yrs. ago. c) 50,000 yrs. ago.
17. according to dr. spray, pieces of the sudbury projectile might be found on the moon. a) true b) false
18. how were sudburys precious minerals likely formed within the impact crater? a) glacial erosion & deposition b) delivered by the original asteroid c) slow cooling of hot, molten rock
19. rich gold mines in south africa were once thought to have been created by volcanic processes. which discoveries indicate a large asteroid impact might have been responsible? a) finely pulverized rock, small meteorites b) overturned rock layers, \shocked\ quartz c) shatter cones, ring structures seen on satellite images

Explanation:

These are multiple - choice questions related to the video "How the Earth Was Made: Asteroids". The questions cover topics such as the features of meteor craters, the composition of space rocks, and the geological evidence of asteroid impacts. The answers are based on the information presented in the video.

Answer:

1. B. Washington Monument
2. A. Observing the moon through his telescope
3. A. They were almost pure iron
4. B. Fine pulverized rock
5. B. Shatter cones
6. A. traumatized
7. C. 50,000 yrs.
8. B. vaporized
9. C. 25,000
10. A. destroyed Hiroshima & Nagasaki
11. A. Shatter cones
12. No answer provided in the steps (but based on the options, none seem clearly correct from the given info)
13. B. Mass spectrometer
14. C. 1,000
15. B. Erosion
16. B. 2 billion yrs. ago.
17. A. True
18. C. Slow cooling of hot, molten rock
19. C. Shatter cones, ring structures seen on satellite images