Vocabulary

Question 1

axis

Answer 1

an imaginary line around which an object spins

Question 2

revolution

Answer 2

one full orbit around the sun

Question 3

rotation

Answer 3

one whole spin of an object on its axis

Question 4

orbit

Answer 4

the path an object takes as it revolves around a star, planet, or moon

Question 5

solar flare

Answer 5

an explosive eruption of waves and particles into space

Question 6

constellation

Answer 6

a group of stars that forms a pattern

Question 7

planet

Answer 7

a large, round object that revolves around a star and has cleared the region around its orbit

Question 8

inner planet

Answer 8

any of the four closest planets to the sun

Question 9

outer planet

Answer 9

any of the four planets in our solar system beyond Mars

Question 10

dwarf planet

Answer 10

a large, round object that revolves around the sun but has not cleared the region around its orbit

Question 11

moon

Answer 11

a natural object that revolves around a planet

Question 12

asteroid

Answer 12

a rocky mass up to several hundred kilometers wide that revolves around the sun

Question 13

comet

Answer 13

a frozen mass of different types of ice and dust orbiting the sun

Question 14

space probe

Answer 14

a spacecraft that gathers data without a crew