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100
Hubble's discovery of shift in the spectra of galaxies suggests that the universe is__________
What is EXPANDING?
100
The largest star in our solar system _________
What is Sun?
100
All stars first begin as a __________.
What is a nebula?
100
A day on a planet is determined by how long it takes to make one full___________.
What is rotation?
100
One piece of evidence that supports Wegener's theory of continental drift is____________
What is fossil evidence, mountain chains, or climatic evidence?
200
Dark _________ and dark _________ make up the universe.
What is energy and matter?
200
By analyzing the light a star emits, astronomers can determine its ______________ and ____________.
What is composition and temperature?
200
A protostar becomes a star when _________ __________ begins to occur.
What is nuclear fusion?
200
The distance a planet is away from the sun determines how long it will take to do this_________.
What is orbit the sun?
300
The temperature of Cosmic Background radiation is _______
What is near absolute 0 or -270 Celsius?
300
Massive stars will end their lives as these.
What are black holes?
300
Our sun is made of 3/4 __________ and 1/4 __________.
What is Hydrogen and helium?
300
This scientist had dreams of drifting continents.
Who is Wegener?
300
The viscosity of magma is determined by its ______ _______.
What is silica content?
400
When an object is moving towards Earth the spectrum is shifted toward the _________ wavelengths of light.
What is blue?
400
These two elements make up most of the Sun's mass.
What is hydrogen and helium?
400
Less massive stars will end their lives as these(Snow White had 7)
What are white dwarfs?
400
Tropical fossils found in Antarctica suggests that at one time, the Earth's continents were ____________.
What is in different positions?
400
This is the method scientists use to determine the order rock units formed in.
What is relative dating?
500
Scientists believe that this event occurred approximately 14 billion years ago.
What is The big bang?
500
The energy produced in the sun's core is the result of this.
What is nuclear fusion?
500
In stars, fission of carbon atoms produce this element________.
What is magnesium?
500
Fossils of this prehistoric creature were found in South America and Africa.
What is Mensosaurus?
500
The early atmosphere developed when many volcanic eruptions released large amounts of gasses in a process called __________.
What is outgassing?