Origin of the universe

Question 1

What does the universe seem to be doing?

Answer 1

Expanding

Question 2

Where are galaxies moving?

Answer 2

Away from eachother

Question 3

Light from other galaxies is…

Answer 3

Red-shifted

Question 4

What do different chemical elements absorb?

Answer 4

Different frequencies of light

Question 5

What does each element produce?

Answer 5

A specific pattern of dark lines at the frequency it absorbs in the visible spectrum

Question 6

What do you see when you look at light from distant galaxies?

Answer 6

The same patterns at lower frequencies

Shifted towards the red end of the spectrum

Question 7

What is red shift?

Answer 7

When frequencies are lower so they are shifted to the red end of the spectrum

Question 8

What is the Doppler effect?

Answer 8

Lower pitch when passed and moving away from you

Question 9

What happens when something emits waves towards or away from you?

Answer 9

Wavelengths and frequencies are different compared to when the source is stationary

Question 10

What is the frequency of a source moving towards you?

Answer 10

Higher

Shorter wavelength

Question 11

What is the frequency of a source moving away from you?

Answer 11

Lower

Longer wavelength

Question 12

What does the Doppler effect happen to?

Answer 12

Longitudinal waves

Transverse waves

Question 13

What happens to the red shift when a galaxy is further away?

Answer 13

Greater red-shift

Question 14

What does red shift suggest?

Answer 14

All galaxies are moving away from us quickly

Question 15

What does red shift provide?

Answer 15

Evidence the universe is expanding

Question 16

What does it mean if a galaxy is further away from us?

Answer 16

They are moving faster

Question 17

What was the big bang?

Answer 17

ALL matter and energy compressed into a small space

It exploded from a single point

Question 18

What is the estimated time the bang occurred?

Answer 18

14 billion years ago

Question 19

What is the steady state theory?

Answer 19

States the universe has always existed as it is now

Suggests that matter is being created in the spaces as the universe expands

Question 20

What is evidence proving the big bang?

Answer 20

Discovery of cosmic microwave background radiation

CMBR

Question 21

What have scientists detected?

Answer 21

Low frequency electromagnetic radiation coming from all parts of the universe

Question 22

Where is low frequency electromagnetic radiation in the EM spectrum?

Answer 22

Microwave

Question 23

What is the only theory which can explain CMBR?

Answer 23

Big bang

Question 24

What happened just after the big bang?

Answer 24

The universe was extremely hot and emitted high frequency radiation

Question 25

What happened as the universe expanded?

Answer 25

Cooled and the radiation dropped frequency

Now seen as microwave radiation

Question 26

What does the big bang theory predict?

Answer 26

The universe expansion is slowing down however it is actually speeding up

Question 27

What does the big bang theory not explain?

Answer 27

What caused the explosion

What conditions were like before