Big Bang Theory
What is the Big Bang Theory?
The theory that all matter started at one single point and exploded into the universe that we know today!
What law says that the universe is always expanding?
Hubble's Law
What does an H-R diagram show us?
The life cycle of stars, comparing brightness and temperature.
Where are all stars born? What is this thing made of?
Stellar nebula-gas and dust
Describe the lifecycle of our star, the sun
Nebula-low mass star-red giant-planetary nebula-white dwarf
The universe started as a what?
Single point (an atom will also be accepted)
True or false: all galaxies are moving away from us at the same speed
False
Name all types of stars that will not be on the main sequence of the H-R diagram.
Red Giants, Red super giants, and white dwarfs
Which color star burns the hottest?
Blue
What is a main sequence star?
A stable star in the middle stages of its life
True or false: Everything that exists today (even people) are created with matter that formed during the Big Bang
True
Which galaxy will eventually collide with our galaxy (the milky way) because of its speed?
Andromeda
The H-R Diagram shows us that the larger the mass of the the star that which of the following is true:
A. It will be dimmer B. It will be Brighter C. It will have a shorter life D. Both B and C
D. B. It will be Brighter C. It will have a shorter life
Large and very large mass stars, before their life ends will go through this *boom*
Supernova
What is Nuclear Fusion (this is what creates stars) (think gas)
Hydrogen atoms coming together to form helium
What law made scientists really start believing in the Big Bang Theory?
Hubble's Law
How can a balloon be used to demonstrate the expansion of the universe? Be specific
It expands showing which galaxies move further and faster and which ones move slower
What group are most stars found in on the H-R diagram and what does this mean?
Main sequence - most stars are stable
The larger the mass of the star, its lifespan
decreases
As a star goes though its life, what happens to its core temperature?
It increases then decreases
Space should (in theory) be 0 Kelvin but has shown to be around 3-4 Kelvin. What does this mean?
There is heat remaining in space from the big bang
Fill in the blanks:
Galaxies that further from us move ________ and _______ while galaxies close to us move _______.
Galaxies that further from us move further and faster while galaxies close to us move slower.
Why is the bottom axis (x Axis) strange compared to most graphs?
It goes from hottest to coldest (starts with higher numbers and then gets lower)
Name the final stage of life for a low mass star, a large mass star, and a very large star.
White Dwarf, Neutron Star, Black Hole
What causes a star like our sun to become a red giant/supergiant?
Fusion stops in our core, it burns only helium and helium burns hotter that hydrogen so the star expands