Flashcards in Vocab Deck (33):
1

Orbit

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

2

Solar System

The sun and family of orbiting planets and moons and other objects

3

Galaxy

Million and billions of stars held together in a group by their own gravity

4

Universe

Space and all the matter and energy in it

5

Satelite

An object that orbits a more massive object

6

Impact crater

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

7

Rotation

An imaginary line about which a turning body such as earth rotates

8

Revolution

The motion of one body around another, such as the earth in its orbit around the sun

9

Seasons

One of a pattern of temperatures changes and other weather trend over the course of a year

10

Equinox

In an orbit, a position and time in which the sun shines equally on north hemispheres

11

Solstice

In an orbit, a position and time during which hemisphere receives the max sunlight

12

Mare

A large dark plain of solidified

13

Eclipse

An event during which one object in space casts a shadow onto another

14

Umbra

The dark central region of a shadow such as the come of complete shadow cast by an object

15

Penumbra

A region lighter shadow that may surround a dark central region

16

Astronomical unit

Average distance from the sun which is 93,000,000 miles

17

Ellipse

An oval or flattened circle

18

Terrestrial Planet

A planet that has a rocky surface

19

Gas Giant

A large planet that consists mostly gases in a dense form

20

Asteroid

A small solid rocky body that orbits the sun

21

Comet

A body that produces a coma of gas and dust, a small icy body that orbits the sun

22

Meteor

A brief streak with of light produced by a particle entering earths atmosphere and reaches the surface

23

Geocentric

Earth centered theory of the solar system

24

Heliocentric

A sun centered theory of the universe

25

Gravity

The force that objects exert on one another because of their mass

26

Tide

The rise and fall of the oceans caused by the gravitational pull of the moon and sun

27

Waxing

The gradual increase of the illuminated surface of the moon

28

Waning

The gradual decrease in the illuminated surface of the moon

29

Gibbous Moon

More than half but less than fully illuminate

30

Crescent Moon

The illuminated surface is less than a quarter illuminated

31

Full Moon

The entire surface of the moon is illuminated

32

New Moon

The entire surface of the moon is not illuminated

33

Quarter Moon

Mall of the moon is illuminated