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AAA - PHYSICS - Revision > Topic 8-Space physics > Flashcards

Topic 8-Space physics Flashcards

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1
Q

What do stars initially form from?

A

A cloud of dust and gas.

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2
Q

What is a cloud of dust and gas called?

A

A nebula.

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3
Q

What can be formed from a nebula?

A

A protostar.

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4
Q

How is a protostar formed by a nebula?

A

The gravity pulls the dust and gas together.

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5
Q

What is a protostar eventually turned into?

A

A main sequence star.

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6
Q

How long does a main sequence star usually last?

A

Billions of years.

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7
Q

Why does a protostar eventually turn into a main sequence star?

A

Because there is lots of pressure from nuclear fusion which tries to expand the star balancing the force of gravity, pulling everything inwards.

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8
Q

What does a main sequence star turn into?

A

A red giant or a red super giant.

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9
Q

What is our sun?

A

A red giant.

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10
Q

Why does a main sequence star turn into a red giant?

A

Because it runs out of hydrogen.

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11
Q

What does a normal red giant turn into?

A

A white dwarf.

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12
Q

What does a white dwarf turn into?

A

A black dwarf.

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13
Q

What does a red super giant turn into?

A

A supernova.

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14
Q

What does a supernova turn into?

A

A neutron star or a black hole.

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15
Q

What is a black hole?

A

A dense point in space where light can’t escape.

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16
Q

How many planets do we have in our solar system?

A

Eight.

17
Q

Name a dwarf planet in our solar system.

A

Pluto.

18
Q

What planet is closest to the sun.

A

Mercury.

19
Q

What planet is second closest to the sun?

A

Venus.

20
Q

What planet becomes before the earth in the order of planets in our solar system?

A

Venus.

21
Q

What planet is after Earth?

A

Mars.

22
Q

What is the last planet in our solar system?

A

Neptune.

23
Q

What are planets?

A

Large objects that orbit a star.

24
Q

What are dwarf planets?

A

Objects that orbit a star but don’t meet the requirements of being an actual planet.

25
Q

What are moons?

A

Objects that orbit planets and aren’t man made.

26
Q

What are artificial satellites?

A

Satellites humans have built.

27
Q

What galaxy is our solar system part of?

A

The milky way galaxy.

28
Q

The closer you get to a star or a planet…

A

The stronger the gravitational force is.

29
Q

What is meant by the red shift?

A

When the wavelengths of light from other galaxies is longer than it should be.

30
Q

Do close galaxies or far away galaxies have the greatest red shift effect?

A

Far away.

AAA - PHYSICS - Revision (7 decks)

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