formation of the solar system (ch. 3)

Question 1

nebula

Answer 1

a large cloud of gas and dust where stars are born and where stars die

Question 2

solar nebula

Answer 2

the large cloud of dust that formed our solar system

Question 3

nuclear fusion

Answer 3

the combination of the nuclei of small atoms to form a larger nucleus; releases energy

Question 4

sunspot

Answer 4

a dark area of the photo sphere of the sun that is cooler than the surrounding areas and that has a strong magnetic field

Question 5

crust

Answer 5

the thin and solid outermost layer of the earth above the mantle

Question 6

mantle

Answer 6

the layer of rock between the earth’s crust and core

Question 7

core

Answer 7

the central part of the earth below the mantle

Question 8

rotation

Answer 8

the spin of a body on its axis

Question 9

orbit

Answer 9

the path that a body follows as it travels around another body in space

Question 10

revolution

Answer 10

the motion of a body that travels around another body in space; one complete trip along an orbit