Big Bang
The approximate age of the universe.
13.8 billion years
Explosion of a high mass star
supernova
Which layer of the sun conducts nuclear fusion and produces energy
core
What is the line up of the earth moon and sun during a lunar eclipse?
sun- earth- moon
Extrusive rocks cool more ________ so their crystals are _________
quicky, smaller
What is the hydrogen to helium ratio in the universe?
Hydrogen 75% and helium 25%
Graph that compares stars based on their temperature and luminosity
Hertzsprung-Russel Diagram
1 Earth revolution is equal to ________.
365 days
What group of minerals contains Si and O?
silicates
Type of rock from sand and silt
sedimentary rock
According to the doppler effect, as an object moves away from you, sound waves are _________.
stretched out, further apart
Second stage of a star's development before fusion
protostar
Which of Kepler's laws addresses speed and the pull of earth around the sun.
Kepler's 2nd Law
Which group of minerals only contains one element?
Native elements
Rock type with high silica content
granitic rock
Point where everything began, where all energy and heat were focused.
Point of singularity
What color stars are the coolest stars?
Red
What is the degree of tilt the Earth's axis spins?
What is the softest mineral on the Mohs Hardness scale?
Talc
What characteristic of rock texture has a spongy appearance with holes?
vesicular
What three pieces of evidence supports the BBT?
Red shift theory
Percentage of hydrogen and helium
Cosmic background radiation
The sun is this type of star
main sequence
What tides occur when the earth, moon and sun all line up in a straight line?
Spring Tides
List 3 characteristics of minerals
inorganic, solid, crystalline structure
Metamorphic rock is created by ___________.
pressure and heat