Universe Flashcards
1
Q
familiar matter in our universe
A
Normal Matter
2
Q
unknown matter in our universe
A
Dark Matter
2
Q
causes the acceleration of the universe’s expansion
A
Dark Energy
3
Q
most abundant elements in the universe
A
Hydrogen and Helium
4
Q
huge, luminous body of gas
A
Stars
5
Q
a huge, rotating group of gas, dust, stars, and their solar systems
A
Galaxy
6
Q
what is the age of the universe
A
13.7 Billion Years Old
7
Q
Explain the age of the universe
A
no objects beyond that age were found
8
Q
light from the galaxies moving away from us are shifted towards longer wavelengths
A
redshift theory
9
Q
violet waves
A
high frequency, short wavelength
10
Q
red waves
A
low frequency, long wavelength
11
Q
related the speed of the galaxy to the distance from the earth
A
hubble’s law
