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Science > Space And Satelites > Flashcards

Space And Satelites Flashcards

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1
Q

Day

A

24 hours, the time it takes the Earth to spin once on its axis

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2
Q

Moon

A

A large lump of rock orbiting around a planet

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3
Q

Orbit

A

The path that a planet takes around the Sun, or the path that a moon or satelite takes to around a planet

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4
Q

Equator

A

An imaginary line around the middle of the earth

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5
Q

Axis

A

An imaginary vertical line that goes from one pole to the other

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6
Q

Luminous

A

Gives out light

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7
Q

Universe

A

All the galaxies and the space between them

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8
Q

Star

A

A huge ball of gas that gives out heat and light energy

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9
Q

Milky Way

A

The galaxy that our solar system is in

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10
Q

Light year

A

The distance that the light travels in one year

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11
Q

Galaxy

A

Millions of stars grouped together

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12
Q

Constellation

A

A pattern of stars

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13
Q

Solar system

A

A Star with planets and other objects orbiting it

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14
Q

Satelite

A

Anything that orbits a planet

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15
Q

Sun

A

The star that Earth orbits around

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16
Q

Year

A

Then length of time it takes a planet to go around the Sun

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17
Q

Hemisphere

A

The two halves of a sphere - the shape you would get if you would cut a solid ball in half

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18
Q

Asteroid

A

A small lump of rock orbiting around the Sun

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19
Q

Inner planets

A

Mercury, Venus, Earth and Mars

20
Q

Outer planets

A

Jupiter, Saturn, Uranus and Neptune

21
Q

How is weight measured

A

In newtons

22
Q

What is weight

A

The effect of gravity on an object

23
Q

How to work out the weight if an object

A

Mass * Gravity = weight

24
Q

What is mass

A

The amount of matter in an object

25
Q

How is mass measured

A

In kilograms

26
Q

Why is the force of gravity bigger on other planets

A

Because the planet has a bigger mass

27
Q

How does the temperature change with it’s distance from the sun

A

The further away you are, the temperature decreases

28
Q

How does the yearly orbit of a planet change with it’s distance from the sun

A

The further away you are, the longer the year

29
Q

Difference between man-made and natural satellite

A

Man-made are artificial and natural are natural

30
Q

Differences between geostationary and polar orbit

A

Geo stationary orbits as the Earth spins and polar orbit orbits around poles as the earth spins

31
Q

Use of geostationary and polar orbit

A

Geo stationary: comunication and navigation

Polar: weather and spy

32
Q

How do scientists find out about distances

A

With waves

33
Q

Why do we have seasons

A

Because Earth’s axis is not perfectly straight, therefore sometimes Earth is further away from the sum

34
Q

Which is the order of the planets?

A 
Mercury 
Venus 
Earth
Mars 
Jupiter 
Saturn 
Uranus 
Neptune
35
Q

Which is the pattern of the temperature for the planets?

A

The general pattern is the temperature decreases as the planets get further from the sun except Venus which is hotter than mercury

36
Q

How do we calculate weight

A

Mass * gravity = weight

37
Q

First idea of the solar system

A

Planets and stars orbited around Earth

38
Q

What was the first idea of the solar system

A

Geo centric model, Earth is at the centre by Ptolemy

39
Q

What was the second idea of the solar system

A

Heliocentric model, all the planets orbit the Sun in perfect circle by Copernicus

40
Q

What was the actual model of the solar system

A

The law of planetary motion, planets orbit in an elipsis by Kepler

41
Q

What is one light year

A

9.461 X 10^15km or 946,100,000,000,000km

42
Q

Why does the length of a day vary through the year

A

The change between day and night is caused by the rotation of the Earth on its axis. The changing lengths of days and nights depends on where you are on Earth and the time of year

43
Q

Advantages and problems of a telescopes

A

Cheap but they only work at night if it is clear

44
Q

Advantages and problems of a rovers

A

Can take samples and send info back to Earth but may crash

45
Q

Advantages and problems of a satelites

A

Don’t need astronauts so they can go deep in space but cant be fixed

Science (38 decks)

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