Astrology Flashcards
The Big Bang theory starts with…
Hot and dense matter
The Big Bang theory had a ________ leading to a _______ of matter
Explosion, expansion
Who theorised the Big Bang ?
Georges Lenaître
The red shift provides evidence that
The galaxies are expanding and moving away from each other
What does red-shift mean
The increase in wavelength of light from a distant galaxy moving away from Earth
Galaxies appear red due to the fact that
They’re moving away form each other. This means the light is stretched and appears red.
An larger red-shift indicates
The galaxy is moving away faster
Red-shift is an example of
The Doppler effect
What does CMBR mean?
Cosmic Microwave Background Radiation
CMBR that is found in Earth’s atmosphere is thought to be residue from
The Big Bang theory ~13 billion years ago
What was the same temperature over the world from CMBR
-270C
What are two pieces of evidence for the Big Bang theory
-CMBR
-Red-shift
What is dark matter
Mass in the universe that uses a gravitational pull on the universe
____ of the universe is dark matter
68%
Dark Matter has no
EMF Radiation
What effect is ‘dark matter’ thought to have on our universe
Causing the universe to rotate faster
If the amount of radiation absorbed is greater than the radiation emitted, the temperature of the object
Increases
If the amount of radiation absorbed is less than the radiation emitted, the temperature of the object
Decreases
If the amount of radiation absorbed is equal than the radiation emitted temperature of the object
Constant
What two properties of emitted radiation does the temperature of a body determine?
Frequency and wavelength
If the wavelength increases, the temperature
Increases
If the intensity increases the temperature
Increases
If the radius of the orbit decreases, the speed _______ as the gravitational attraction is ______.
increases, greater.
In a main sequence star, hydrogen nuclei are fused together to form _________
This releases energy as heat and light.
helium
A black dwarf doesn’t ______
emit (send out) any light or heat.
As the helium fuel runs out, ____________
This causes its temperature to increase.
the outward forces reduce in size and the star collapses inwards.
A white dwarf is formed, which is the_______
hot core of the star.
All stars fuse …
hydrogen nuclei into helium in nuclear fusion.
Larger stars fuse …
hydrogen nuclei into lithium and other light metals.
A supernova produces …
enough energy for hydrogen nuclei to form elements heavier than iron.
What is left behind by a supernova?
black hole
