Conor Science Chapter18

Front 1

universe

Back 1

all of space and everything in it.

Front 2

galaxy

Back 2

system of dust, gas and many miillions of stars held together by gravity

Front 3

Milky Way

Back 3

The galaxy we live in.
Shaped like a flat spiral.
Has billions of stars.

Front 4

astronomy

Back 4

study of the sun, moon, stars and other objects in space

Front 5

solar system

Back 5

sun, planets, their moons and other objects. Everything revolves around the sun.

Front 6

planet

Back 6

very large, ball shaped object that moves around a star. Cooler and smaller than stars. They reflect light from the sun.

Front 7

Inner Planets

Back 7

Mercury, Venus, Earth and MArs
Small, rocky planets

Front 8

OUter Planets

Back 8

Jupiter, Saturn, Neptune and Pluto

Front 9

Asteroid Belt

Back 9

between the inner and outer planets

Front 10

asteroid

Back 10

small objects that also orbit the sun but are too small to be called planets

Front 11

Sun

Back 11

Ours is a medium size
Biggest body in the Solar System.
Huge ball of hot, glowing gases.
Energy provides light and heat.
Outer part much cooler than inner part.

Front 12

Mercury

Back 12

Covered in craters made by meteorites.
Scorching hot during the day and cold at night.
Has no atmosphere.

Front 13

Venus

Back 13

Turns in the opposite direction.
Very hot and dry.
Clouds are burning hot and poisonous.
Strong winds and lightening.
Brightest object in Earth's sky.

Front 14

Earth

Back 14

Largest inner planet.
Only planet with liquid water.
Atmosphere makes life possible.
Contains Nitrogen, Oxygen, carbon dioxide and water vapor.

Front 15

Moons

Back 15

Satellites of planets.

Front 16

Mars

Back 16

rocks and soil conatin the mineral iron oxide.
the "red planet"
Has 2 moons.

Front 17

Jupiter

Back 17

Biggest planet.
Has the most moons.
Has a weather system called "the great red spot"

Front 18

Saturn

Back 18

Has many rings made of ice, dust and chunks of ice

Front 19

Uranus

Back 19

Furthest planet you can see without a telescope.
Atmosphere is hydrogen, helium and methane.
It has rings and many moons.
Rotates on its side.

Front 20

Neptune

Back 20

Smallest of the gas giants.
Takes more than 60 years to orbit the sun.
Has a hurricane like storm called the 'dark spot'

Front 21

Pluto

Back 21

Only planet that is not a gas giant.
Has an icy solid surface.
Considered a dwarf planet.
Orbit is tilted.

Smallest planet.