Lecture 11/8

Question 1

How do planets form?

Answer 1

Gas and dust in protocólame tart disks grow from smaller to larger bodies

Question 2

Asteroids are

Answer 2

Small rocky bodies that orbit the sun

Question 3

Most asteroids are less than ___ m in diameter

Answer 3

10

Question 4

Largest asteroid

Answer 4

Ceres (950 km)

Question 5

Most asteroids are in orbit between

Answer 5

Mars and Jupiter

Question 6

Ceres was upgraded from an asteroid to a

Answer 6

Dwarf planet

Question 7

Dawn was

Answer 7

A nasa mission launched in 2007 to study Vesta and Ceres

Question 8

Dawn was the first spacecraft to

Answer 8

Orbit two different extraterrestrial bodies and orbit a dwarf planet

Question 9

Discovered by dawn, Ceres may have

Answer 9

Subsurface oceans

Question 10

Late heavy bombardment

Answer 10

3.8 billion years ago

Period of intense comet and asteroid bombardment in the solar system

Question 11

Evidence of late heavy bombardment

Answer 11

Craters on the moon, asteroids, terrestrial planets, etc

Question 12

Life on earth started towards the end of the

Answer 12

Late heavy bombardment

Question 13

What might have provided water to earth

Answer 13

Comets and asteroids

Question 14

Carbon from meteorites may have reacted with earths atmosphere to form

Answer 14

Hydrogen cyanide

- cyanide is a possible pathway for carbon atoms to enter the chemistry of life

Question 15

Last sterilization happened during what era

Answer 15

Hadean

Question 16

Equation that describes energy imparted by meteor impact

Answer 16

E=.5mv^2

Question 17

Why would a comet’s orbital velocity at 1 AU be different from Earth’s?

Comet has smaller radius
Comet has lower mass
Comet rotating more rapidly
None of these

Answer 17

None of these

Question 18

Cometa typically come from the

Answer 18

Kuiper belt

Question 19

ESA’s Rosetta mission

Answer 19

12 November 2014

Landed on comet