7.16-7.19 Evolution of stars Flashcards

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1
Q

How is a Nebula formed?

A

Gravity pulls dust and gas together to a form a massive cloud known as nebulae

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2
Q

What is the main gas in nebulae?

A

Hydrogen

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3
Q

How is a main sequence star formed?

A

.The force of gravity holding the star together is balanced at higher pressure due to the high temperatures

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4
Q

How is a red giant formed?

A

When all the hydrogen has been used up in the fusion process large nuclei begin to form and the star may expand to become a red giant

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5
Q

Hows a white dwarf star formed?

A

.When all nuclear reactions are over a small star will being to contract under the force of gravity
.In this instance the star will begin to become a white dwarf which fades and changes colour as it cools

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6
Q

How does the balance between thermal expansion and gravity affect a star?

A

.The outward pressure from the stars outward hot gases is balanced by the force of the stars gravity

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7
Q

State the life cycle of a star that is larger than the sun

A
.Protostar
.Main sequence star
.Red super giant star
.Supernova
.Black hole or neutron star
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8
Q

What wavelengths can be used when observing space?

A

All in the EM spectrum

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9
Q

Which three rays cannot be measured in the Earths atmosphere?

A

.X rays
.Gamma
.UV

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10
Q

Why can you not measure X rays, Gamma and UV rays in the Earths atmosphere?

A

.The atmosphere does not allow these to reach the ground

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11
Q

What did early refracting telescopes evolve to?

A

Reflecting telescopes

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12
Q

What did Technological advances allow for?

A

Other parts of the EM spectrum to be measured and collected

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