Test 1 Term 1 2015

Question 0

What is the main sequence of a massive star

Answer 0

Red supergiant.
Supernova
Black hole or neutron star.

Question 1

What is the main sequence of an average star ?

Answer 1

Red giant
Planetary nebula
White dwarf
Black dwarf

Question 2

What determines wether a supernova becomes a black hole or neutron star ?

Answer 2

The amount of material left behind.
BLACK HOLE - large amount left behind( immense pressure causes it to shrink)
NEUTRON STAR - average amount left behind (very dense)

Question 3

What is nuclear fusion ?

Answer 3

When gravitational forces causes materials to collapse and condense, the temp also increases.

Question 4

What is radiation pressure ?

Answer 4

Nuclear fusion releases immense heat known as radiation pressure which causes the radius of a star to be balanced and stable.

Question 5

What four forces control the accelerated expansion of the universe ?

Answer 5

1. Electromagnetism
2. Strong nuclear force
3. Weak nuclear force
4. Gravity

Question 6

What is some evidence for the Big Bang ?

Answer 6

CMB - cosmic microwave background

This was detected by the BICEP project and supported the inflation model of the universe.

Question 7

What are the different variables ?

Answer 7

Independent - changed by scientist to ensure a fair test

Dependent - is what will be measured; it’s what the investigator thinks will be affected during the experiment.

Controlled - the thing that is kept the same through the entire experiment.

Question 8

What is the law of conservation of mass and energy ?

Answer 8

Mass - mass cant be created nor destroyed.

Energy - Energy cannot be created or destroyed, but it can be transformed.

Question 9

What processes remove and add carbon to the atmosphere ?

Answer 9

THE CARBON CYCLE

Question 10

What are causes and effects of climate change ?

Answer 10

Causes - carbon emission

Effects - biodiversity, sea levels rising

Question 11

What are the steps of the scientific method ?

Answer 11

Ask a Question
Do Background Research
Construct a Hypothesis
Test Your Hypothesis by Doing an Experiment
Analyze Your Data and Draw a Conclusion
Communicate Your Results

Question 12

What is some evidence for the big bang ?

Answer 12

Red shift - redshift happens when light or other electromagnetic radiation from an object is increased in wavelength. All galaxies appear to be moving apart.