Astrology Flashcards

1
Q

The Big Bang theory starts with…

A

Hot and dense matter

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2
Q

The Big Bang theory had a ________ leading to a _______ of matter

A

Explosion, expansion

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3
Q

Who theorised the Big Bang ?

A

Georges Lenaître

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4
Q

The red shift provides evidence that

A

The galaxies are expanding and moving away from each other

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5
Q

What does red-shift mean

A

The increase in wavelength of light from a distant galaxy moving away from Earth

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6
Q

Galaxies appear red due to the fact that

A

They’re moving away form each other. This means the light is stretched and appears red.

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7
Q

An larger red-shift indicates

A

The galaxy is moving away faster

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8
Q

Red-shift is an example of

A

The Doppler effect

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9
Q

What does CMBR mean?

A

Cosmic Microwave Background Radiation

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10
Q

CMBR that is found in Earth’s atmosphere is thought to be residue from

A

The Big Bang theory ~13 billion years ago

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11
Q

What was the same temperature over the world from CMBR

A

-270C

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12
Q

What are two pieces of evidence for the Big Bang theory

A

-CMBR
-Red-shift

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13
Q

What is dark matter

A

Mass in the universe that uses a gravitational pull on the universe

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14
Q

____ of the universe is dark matter

A

68%

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15
Q

Dark Matter has no

A

EMF Radiation

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16
Q

What effect is ‘dark matter’ thought to have on our universe

A

Causing the universe to rotate faster

17
Q

If the amount of radiation absorbed is greater than the radiation emitted, the temperature of the object

18
Q

If the amount of radiation absorbed is less than the radiation emitted, the temperature of the object

19
Q

If the amount of radiation absorbed is equal than the radiation emitted temperature of the object

20
Q

What two properties of emitted radiation does the temperature of a body determine?

A

Frequency and wavelength

21
Q

If the wavelength increases, the temperature

22
Q

If the intensity increases the temperature

23
Q

If the radius of the orbit decreases, the speed _______ as the gravitational attraction is ______.

A

increases, greater.

24
Q

In a main sequence star, hydrogen nuclei are fused together to form _________
This releases energy as heat and light.

25
A black dwarf doesn’t ______
emit (send out) any light or heat.
26
As the helium fuel runs out, ____________ This causes its temperature to increase.
the outward forces reduce in size and the star collapses inwards.
27
A white dwarf is formed, which is the_______
hot core of the star.
28
All stars fuse ...
hydrogen nuclei into helium in nuclear fusion.
29
Larger stars fuse ...
hydrogen nuclei into lithium and other light metals.
30
A supernova produces ...
enough energy for hydrogen nuclei to form elements heavier than iron.
31
What is left behind by a supernova?
black hole