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Science Revision > Space & Satellites > Flashcards

Space & Satellites Flashcards

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1
Q

Which direction is down?

A

Gravity pulls things ‘down’ towards the center of the planet

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2
Q

How does gravity affect objects?

A

It pulls them down, towards the ground. A big object attracts a smaller object.

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3
Q

How do you work the weight of an object from its mass

A

If you know the mass of an object and the strength of gravity you can work out the weight of an object.
Weight(N) = mass(kg) x strength of gravity (N/kg)

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4
Q

Differences between weight and mass (weight)

A

Weight- the effect of gravity on an object

          - measured in newtons (N) 
          - varies on different planets
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5
Q

Differences between weight and mass (mass)

A

Mass- the amount of matter in an object

       - measured in kilograms 
       - always the same
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6
Q

Why is gravity different on other planets?

A

Because gravity depends on the size of the planet and not all of the planets are the same size.

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7
Q

Definition of day

A

The time it takes for a planet to rotate on its axis

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8
Q

Definition of moon

A

A natural satellite

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9
Q

Definition of asteroid

A

A small lump of rock orbiting around the sun.

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10
Q

Constellation

A

A pattern of stars

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11
Q

Milky Way

A

The galaxy where our solar system is in

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12
Q

Galaxy

A

Millions of stars grouped together

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13
Q

Orbit

A

The path a planet takes around the Sun, or the path that a moon or satellite takes around a planet.

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14
Q

Light year

A

A light year is the distance light travels in a year.

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15
Q

What is the relationship between gravity/ mass/ distance

A

The larger the mass the larger the gravity, and the closer the distance the larger the gravity.

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16
Q

What is a satellite?

A

An object that revolves (orbits) around a planet

17
Q

Differences between geostationary and polar orbit satellites

A

Polar: multiple orbits a day and goes from north to south
Geostationary: appears to stay in one place above Earth. Follows Earth’s rotations. It goes horizontally.

18
Q

Uses of polar orbit satellites

A
  • monitoring weather

- spying

19
Q

Uses of geostationary orbit satellites

A
  • Communication
  • TV
  • phones
20
Q

Different ways in which scientists can find out about the solar system

A

Telescopes, infrared cameras, red shift light

21
Q

Advantages of telescopes

A

You can see from very far away

22
Q

Advantages of infrared cameras

A

It stays recorded

23
Q

Advantages of red shift light

A

You know if a star is getting closer or getting away.

24
Q

Early ideas about the Solar System

A

Ptolemy thought that the center of the solar system was the Earth and the Copernicus said no, the center of the solar system was the Sun

25
Q

How are our modern ideas about the solar system different to before

A

Before they thought the center of the solar system was the Earth an that all the rest of the planets orbited around him.

26
Q

Our current model of the solar system

A

The Sun is the center of the Solar System. Then there’s Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. They all orbit in elliptical shape.

27
Q

Some evidence for our current model of the Solar System

A

We can see the planets and their location. We can send satellites to the moon, and we can see the Sun, stars and comets

28
Q

Differences between geostationary and polar orbit satellites

A

Polar: multiple orbits a day and goes from north to south
Geostationary: appears to stay in one place above Earth. Follows Earth’s rotations. It goes horizontally.

29
Q

Uses of polar orbit satellites

A
  • monitoring weather

- spying

30
Q

Uses of geostationary orbit satellites

A
  • Communication
  • TV
  • phones
31
Q

Different ways in which scientists can find out about the solar system

A

Telescopes, infrared cameras, red shift light

32
Q

Advantages of telescopes

A

You can see from very far away

33
Q

Advantages of infrared cameras

A

It stays recorded

34
Q

Advantages of red shift light

A

You know if a star is getting closer or getting away.

35
Q

Early ideas about the Solar System

A

Ptolemy thought that the center of the solar system was the Earth and the Copernicus said no, the center of the solar system was the Sun

36
Q

How are our modern ideas about the solar system different to before

A

Before they thought the center of the solar system was the Earth an that all the rest of the planets orbited around him.

37
Q

Our current model of the solar system

A

The Sun is the center of the Solar System. Then there’s Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. They all orbit in elliptical shape.

38
Q

Some evidence for our current model of the Solar System

A

We can see the planets and their location. We can send satellites to the moon, and we can see the Sun, stars and comets

Science Revision (5 decks)

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