P16 Space

Question 1

Life cycle of a star like our sun

Answer 1

Nebula
Protostar
Main sequence
Red Giant 
White dwarf
Planetary nebula

Question 2

Life cycle of star larger than our sun

Answer 2

Nebula 
Protostar
Main sequence 
Red Super giant 
Super nova 
Either neutron star or black hole if the star was large enough

Question 3

What is the force that allows planets and satellites to maintain their orbits?

Answer 3

Gravity

Question 4

For a stable orbit, what happens when speed changes?

Answer 4

Radius must change

Question 5

What is redshift?

Answer 5

The further away galaxies are, the faster they are moving and the bigger the observed increase in wavelength.

Question 6

Evidence that supports the big bang theory

Answer 6

Red shift

Cosmic background radiation

Question 7

How does cosmic background radiation provide evidence for the big bang theory?

Answer 7

Microwave radiation received and is identical in all parts of universe
Shows at one time the entire universe was at the same point

Question 8

What does the big bang theory suggest?

Answer 8

The universe began from a very small region that was extremely hot and dense.

Question 9

What do we still not know much about in space?

Answer 9

Dark mass
And
Dark energy

Question 10

How did scientists come to the BIG BANG THEORY

Answer 10

The presence of COSMIC BACKGROUND RADIATION recieved from all parts of the universe shows that everything came from one dense region

Question 11

How does the change of each galaxy’s speed with distance is

evidence of an expanding universe

Answer 11

• The fact that galaxies further away are moving faster than closer galaxies (shown by their increased red-shift)
• provides evidence of an expanding universe
• because the universe is belived to have started at a very dense centre that expanded into what we know today

Question 12

What has been recorded since 1998?

Answer 12

That the distance between galaxies is expanding even faster