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Science Year 10 > Astro Questions > Flashcards

Astro Questions Flashcards

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1
Q

What are the three types of main sequence stars

A

Massive star
Brown Dwarf
Low mass Star

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2
Q

What does a massive star become when it starts to die

A

Red Supergiant

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3
Q

What does a low mass star become when it starts to die

A

Red Giant

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4
Q

What happens when a red supergiant dies

A

Supernova

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5
Q

What happens when a red giant dies

A

White Dwarf
Planetary Nebula

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6
Q

What comes after a supernova

A

Supernova remnant
Black hole
Neutron star

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7
Q

What happens to a planetary nebula

A

White dwarf

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8
Q

What can a neutron star become

A

Pulsar

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9
Q

What can a black hole become

A

x-ray emission

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10
Q

What does a white dwarf become

A

Supernova
Nova

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11
Q

What can a nova become

A

White dwarf

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12
Q

How long ago did the big bang happen

A

13.77 bill years ago

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13
Q

what happen t=1/10^43 sec after the big bang

A

Time and space begun
temp was 1mill trill trill degrees celcius

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14
Q

what happen t=1/10^34 sec after the big bang

A

Matter such as positron and electrons formed
Particles collided causing the first light in the universe

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15
Q

what happen t=1/10^4 sec after the big bang

A

Protons and neutrons formed due to collisions of particles

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16
Q

what happen t=1/100 sec after the big bang

A

Expanding and cooling rapidly

17
Q

what happen t=1 sec after the big bang

A

The universe was probably more than trill trill km across
temp 10 bill degrees Celsius

18
Q

what happen t=5 min after the big bang

A

Nuclei of Hydrogen, helium, lithium formed

19
Q

what happen t=300000 years after the big bang

A

about 1/1000 of its current size
temp 3000 degrees Celsius
First atoms formed
Universe was dark

20
Q

what happen t=200 000 000 years after the big bang

A

First stars formed
Nuclear reaction happened within stars
planets started to form from heavier nuclei

21
Q

what happen t=1 000 000 000 years after the big bang

A

The first galaxies formed

22
Q

Proof of the big bang

A

Red Shift
Cosmic Microwave Background radiation

23
Q

How does a star start to form

A

Star formation begins when hydrogen gas is pulled
into a dense ball by gravity.

24
Q

What happens in a main sequence star

A

The compression of hydrogen in a protostar
continues for hundreds of thousands of years.

When the temperature reaches 13 million
degrees Celsius, nuclear fusion begins.

25
Q

What is an interstellar medium

A

The interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy.

Science Year 10 (8 decks)

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