Solar System

Question 1

The circular path of an object as it revolves around another object due to gravity

Answer 1

Orbit

Question 2

A system of objects that revolve around a star

Answer 2

Solar system

Question 3

A group of solar systems, dust, and gas held together by gravity

Answer 3

Galaxy

Question 4

Space and all the matter in it

Answer 4

Universe

Question 5

An object that orbits a more massive object

Answer 5

Satellite

Question 6

A round pit left behind on the surface of a planet after a smaller thing strikes the

Answer 6

Impact Crater

Question 7

The spinning of a celestial body, such as a planet, around an axis

Answer 7

Rotation

Question 8

The orbiting of an object around another object

Answer 8

Revolution

Question 9

A period of the year determined by the position of Earth as it revolves around the sun

Answer 9

Season

Question 10

The time or date at which the sun crosses the celestial equator

Answer 10

Equinox

Question 11

Either of the two times in a year when the sun reaches its highest and lowest point in the sky at noon marked by the longest and shortest days

Answer 11

Solstice

Question 12

A large dark plain of solidified lava on the moon.

Answer 12

Lunar mare

Question 13

One thing casts a shadow onto another

Answer 13

Eclipse

Question 14

The fully shaded inner region of a shadow cast by an opaque object, especially the area on the earth or moon experiencing the total phase of an eclipse

Answer 14

Umbra

Question 15

The outer region of the shadow cast by an opaque object

Answer 15

Penumbra

Question 16

Used to measure distances in the solar system

Earth to sun = 1 AU

Answer 16

Astronomical unit

Question 17

a oval or flattened circle

Answer 17

Ellipse

Question 18

A planet that has a rocky surface

Answer 18

Terrestrial planet

Question 19

a large planet of relatively low density consisting predominantly of hydrogen and helium, such as Jupiter, Saturn, Uranus, or Neptune

Answer 19

Gas giant

Question 20

a small object made of rock or metal that orbits the sun

Answer 20

Asteroid

Question 21

a body of ice and dust that travels in a long narrow orbit around the sun

Answer 21

Comet

Question 22

a streak of light in the sky that forms when a piece of rock from space burns up in Earth’s atmosphere (related term: shooting star)

Answer 22

Meteor

Question 23

a piece of rock or metal from space that strikes Earth’s surface

Answer 23

Meteorite

Question 24

having the Earth as the center

Answer 24

Geocentric

Question 25

having the sun as the center

Answer 25

Heliocentric

Question 26

a force that exists between any two objects that have mass (related word: gravitational)

Answer 26

Gravity

Question 27

the rise and fall of the ocean's surface levels due to the gravitational pull of the sun and moon (related word: tidal)

Answer 27

Tides

Question 28

of the moon between new and full) have a progressively larger part of its visible surface illuminated, increasing its apparent size

Answer 28

Waxing

Question 29

(of the moon) have a progressively smaller part of its visible surface illuminated, so that it appears to decrease in size.

Answer 29

Waning

Question 30

Any moon that appears more than half lighted but less than full is called a gibbous moon. The word gibbous comes from a root word that means hump-backed. ... It's easy to see a waxing gibbous moon in the daytime because, at this phase of the moon, a respectably large fraction of the moon's dayside is now facing our way.

Answer 30

Gibbous moon

Question 31

A crescent is a thin, curved shape that's thicker in the middle and tapers to thin points at each end, like the little sliver of moon you might notice in the sky. Crescent was first used to describe the shape of the waxing, or growing moon, and if you listen closely you can hear its similarity to increase.

Answer 31

Crescent moon

Question 32

the phase of the moon in which its whole disk is illuminated.

Answer 32

Full moon

Question 33

The entire surface of the moon is not illuminated

Answer 33

New moon

Question 34

Half of the surface is not illuminated

Answer 34

Quarter moon

Question 35

An imaginary line which a turning body such as Earth rotates

Answer 35

Axis