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S2 GCSE Physics Unit 2 > Unit 2 - Topic 3 - The Earth and Universe > Flashcards

Unit 2 - Topic 3 - The Earth and Universe Flashcards

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1
Q

What is the sun composed of?

A

Hydrogen

Helium

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2
Q

How are stars formed?

A

Stars are formed when large amounts of dust and gas are drawn together by gravitational forces.

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3
Q

What are the main features of the solar system?

A 
Sun
Rocky planets
Gas planets/Giants
Asteroids and comets
Moons
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4
Q

What provides the centripetal force for the orbital motion of planets, comets, moons and artificial satellites?

A

Gravity

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5
Q

The stability of stars depends on …

A

The balance between gravitational force and gas/radiation pressure.

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6
Q

Uses of artificial satellites

A

Observation of earth
Weather monitoring
Astronomy
Communications

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S2 GCSE Physics Unit 2 (6 decks)

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