Grade 9 Science- Exam Review- Space

Front 1

Earth's Spheres

Back 1

Atmosphere: without the atmosphere, Earth's surface temperature would drop from 15° on average to -18° (drops -33°)

Lithosphere: Earth's core

Hydrosphere: consists of all water on, above and below Earth's surface

All spheres together = biosphere

Front 2

Astronomy Definition

Back 2

The scientific study of Outer Space.

Front 3

Celestial Object Definition

Back 3

Any object that exists in space (planets, starts, etc.)

Front 4

Universe Definition

Back 4

Everything that exists, including all energy, matter, and space (everything that physically exists)

Front 5

Star Definition

Back 5

A massive collection if gases, held together by its own gravity and emitting huge amounts of energy

Front 6

The Sun

Back 6

- The sun is a star.

- Average sized compared with other stars

- Has a mass of almost 340,000 × that of Earth, and a volume that is 1,300,000 × the volume of Earth

Front 7

Scientific Notation

Back 7

A number between 1 and 9 × by powers of 10.

Ex: 340,000 = 3.4 × 10^5

To convert numbers written in scientific notation, move thendecimal place to the right (for + exponents) or to the left (for - exponents) as many places as the exponent indicates.

Front 8

Luminous Definition

Back 8

Producing and giving off light; shining

Front 9

Sun's Energy

Back 9

- gives off light and other forms of radiant energy

- releases solar wind (a stream of high energy particles)

Front 10

Planets Definition

Back 10

A large, round, celestial object that orbits around a star.

Front 11

How many planets are there?

Back 11

There are 8 planets.

Front 12

Order of Planets (closest to the sun- farthest)

Back 12

(My Very Educated Mother Just Served Us Nine Pizzas)

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

Pluto

Front 13

Which is the hottest planet?

Back 13

Venus

Front 14

On which planet would you have the fewest birthdays?

Back 14

Mercury- one year on Mercury is equal is 88 earth days.

Front 15

How many rings does Saturn have?

Back 15

1000+

Front 16

Which planet is considered a Dwarf Planet?

Back 16

Pluto- its too small to be considered a planet.

Front 17

Which is the biggest planet?

Back 17

Jupiter

Front 18

What a terrestrial planets?

Back 18

The four planets closest to the sun- Mercury, Venus, Earth, Mars.

Terrestrial planets have rocky surfaces- like Earth.

Front 19

What are Gas Giants?

Back 19

The last 4 planets- Jupiter, Saturn, Uranus, Neptune.

They are made of mostly gases and liquids.

Front 20

Are planets luminous?

Back 20

No. They do not produce and emit their own light, but we can see them because they reflect light from luminous objects.

Front 21

Which planets can we see with an unaided eye?

Back 21

Mercury, Venus, Mars, Jupiter, and Saturn.

Front 22

Solar System Definition

Back 22

The Sun and all the objects that travel around it.

Front 23

Satellite Definition

Back 23

A celestial object that travels around a planet or a dwarf planet.

Front 24

What is Earth's natural satellite?

Back 24

The moon.

Front 25

The Moon

Back 25

- non-luminous, but reflects light off its surface

- small compared to other planets.

Front 26

Galaxies Definition

Back 26

A huge, rotating collection of gas, dust, and billions of stars, planets, and other celestial objects.