Space Flashcards

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1
Q

List all the phases of the moon

A
First quarter 
Waxing crescent
New
Waning crescent
Last quarter 
Waning gibbous
Full
Waxing gibbous
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2
Q

What is gravity

A

An attractive force between all objects

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3
Q

What is mass

A

Amount of matter(in kg)

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4
Q

What is weight

A

Force due to the planets gravitational pull(in Newtons)

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5
Q

Does gravity push or pull

A

Pull

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6
Q

List the eight planets in order(closest to furthest from the sun)

A
Mercury
Venus
Earth
Mars
Jupiter
Saturn 
Uranus
Neptune
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7
Q

What are the four inner planets made mostly up of?

A

Iron, nickel and rocks

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8
Q

What are the four inner planets

A

Mercury, Venus, Earth and mars

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9
Q

What are the 4 outer planets made mostly up of?

A

Gasses

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10
Q

What are the 4 outer planets

A

Jupiter, Saturn, Uranus, Neptune

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11
Q

What is the generalised name given to the outer planets

A

Gas giants

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12
Q

What are satellites

A

Objects that orbit planets

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13
Q

Fact:

A

Satellites can be man made or natural

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14
Q

Give 1 man made satellite

A

Sputnik 1

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15
Q

Give one natural satellite

A

Europa

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16
Q

What is a geostationary orbit

A

An orbit at the same speed as the planet rotates.

17
Q

What is a polar orbit

A

Orbits around poles, whilst the planet spins underneath.

18
Q

How do scientists believe the universe began

A

The Big Bang. Atoms jammed together and slowly stars began to form.

19
Q

What evidence do they have to support this idea

A

An example is the microwave background.

20
Q

Why is this a theory and not a fact

A

Because no one knows for sure.

21
Q

How old are our galaxies

A

About 13.8 billion years old

22
Q

What is a black hole

A

An area of such forceful gravity, that nothing can escape it.

23
Q

What is a planet

A

An object that must do all of these three things; Orbit a star, be big enough to have enough gravity to keep a spherical shape and big enough that it’s gravity clears away any object of a similar size near its orbit.

24
Q

What is a nebula

A

A giant cloud of dust and gas in space

25
Q

What causes day and night

A

Earth spins on an axis. When one side is facing away from the sun, it is night and for the other side it is day.

26
Q

What causes years and seasons

A

During the course of the year, more of one part of the earth recieves the most rays. This means it is summer.

27
Q

What causes phases of the moon

A

The lunar month

28
Q

What causes lunar eclipses

A

When the moon moves into earths shadow

29
Q

Describe our solar system

A

Lots of planets and stars. Can never see the end. Potentially infinite.

30
Q

Difference between mass and weight

A

Mass it the amount of matter I a material/object, whereas weight is who gravity acts upon the mass.

31
Q

Why does the earth orbit the sun

A

Because all planets orbit stars

32
Q

uses of man made satellites

A
Explore space
Scientific investigations 
Communication 
Navigation
Earth observation