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Physics 101 > Topic 7 – Astronomy > Flashcards

Topic 7 – Astronomy Flashcards

1
Q

Equation for weight

A

W=mg

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2
Q

Why do larger planets have rings?

A

Their gravity pulls debris

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3
Q

What are the two solar system models?

A

Geocentric and Heliocentric

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4
Q

What do the two models of the solar system state?

A

Geocentric - Everything orbits the earth
Heliocentric - Everything orbits the sun

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5
Q

What do the two models of the solar system state?

A

Geocentric - Everything orbits the earth
Heliocentric - Everything orbits the sun

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6
Q

What is the relation between distance from the sun and orbital speed?

A

Closer the planet is to sun, faster the orbital speed

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7
Q

What is red shift?

A

Shifting of spectral lines towards the red end of the spectrum

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8
Q

What is the relations between distance from earth and red shift?

A

Further away from earth, increase in red shift

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9
Q

How does red shift support The Big Bang?

A

Red shift shows there was a beginning to the universe

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10
Q

What is the Steady State Theory

A

As the universe expands, matter is constantly being made

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11
Q

What is all stars first form?

A

Protostar

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12
Q

How does a star form?

A

Nebulae, particle attraction form an equilibrium and star is formed

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13
Q

Why does a star eventually collapse?

A

It runs out of gas to fuse

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14
Q

What happens after a massive star collapse?

A

Increased pressure and temp. allows for fusion and a supernova to form

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15
Q

What happens after a normal star collapse?

A

Increased pressure and temp. allows for a weak fusion and a red giant forms but later cools into a white dwarf

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16
Q

Star cycle of massive star?

A

Protostar, Massive mass star, red super giant, supernova. Can become either a neutron star or a blackhole

17
Q

Star cycle of normal star?

A

Protostar, normal mass star, red giant, white dwarf. black dwarf

18
Q

Nebula:

A

Giant cloud of dust and gas in space

19
Q

How does thermal expansion and gravity affect the life cycle of stars:

A

Gravity pulls all gas and dust inside. Thermal expansion causes to expand

20
Q
A

Physics 101 (20 decks)

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