Curriculum
Course: Igcse Physics
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Curriculum

Igcse Physics

1. Motion, Forces and Energy

0/161 Dr Dabour Hub Science Diagram and Course Material

2. Thermal Physics

0/75 Dr Dabour Hub Science Diagram and Course Material

3. Waves

0/77 Dr Dabour Hub Science Diagram and Course Material

4. Electricity and Magnetism

0/119 Dr Dabour Hub Science Diagram and Course Material

5. Nuclear Physics

0/39 Dr Dabour Hub Science Diagram and Course Material

6. Space Physics

0/47 Dr Dabour Hub Science Diagram and Course Material
Quiz

6.2.3 Star Formation – Check yourself

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1.
Where do stars form?
In nebulae
In black holes
In galaxies' centres only
In the asteroid belt
2.
What force makes the cloud contract?
Magnetism
Fusion pressure
Gravity
Friction
3.
What is a protostar?
A star that has run out of fuel
A very large star
A comet
A hot dense ball of gas before fusion starts
4.
Fusion starts in the core of a protostar when the temperature reaches about…
1000 °C
10 million °C
10 000 °C
1 billion °C
5.
A main-sequence star is stable because…
Gravity is zero
It has no mass
Gravity and outward pressure are balanced
It is cold
6.
Compared with a small star, a massive star on the main sequence…
Uses fuel faster and lasts a shorter time
Lasts longer
Does not fuse
Is colder
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