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28 Cards in this Set
- Front
- Back
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What is the age of the universe? |
13.7 billion years |
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What is the age of the Earth? |
4.6 billion years= 4,600,000 =four thousand six hundred million |
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What is a galaxy?
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Cluster of billions of stars |
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The following list: Universe, Galaxy, Solar system, Earth is in increasing or decreasing size order?
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decreasing |
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What is the name and shape of our galaxy?
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Milky way - Spiral shape |
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What is the approximate position of the sun within the solar system?
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center |
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To be part of the solar system an object must….
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revolve around the Sun |
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Where is the sun and solar system located in the galaxy?
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on a spiral arm 3/4th teh way from the center |
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How many stars are in the solar system?
Hint- trick question perhaps? |
1 the SUN.. silly
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What is a light Year? |
The distance that light can travel in one year almost 6 trillion miles |
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What is the speed of light? |
640 million miles per hour or 186,000 miles per second |
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What unit do astronomers use to measure the distances to stars? |
a light year |
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Two pieces of evidence for the big bang are.... |
Cosmic background radiation |
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Cosmic Background Radiation is detected in the form of |
microwaves |
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Radiation on the electromagnetic spectrum (p.14) in ESRT is categorized based on |
wavelength |
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The color with the longest wavelength is |
red |
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If an object is moving away from earth, its light will show a shift toward which end of the visible spectrum? |
red shift |
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Light from all galaxies show a shift of spectral lines toward the red end of the visible spectrum and provides evidence that the universe is….
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expanding |
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Hubble's Law states that as galaxies are farther away they are... |
Moving Faster away from us |
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Astronomers can measure the speed of galaxies toward or away from Earth by measuring |
The wavelength shift in an elements spectrum (doppler effect) |
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The diagram on top shows the spectral lines for an element. The spectrum of the same element observed in the light from a distant star is shown below it. The shift in the spectral lines |
away |
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Stars form from immense clouds of gas and dust called a _____________.
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nebula |
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Stars create their energy from |
Nuclear fusion |
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What force is responsible for turning a nebula into a star? |
gravity |
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Nuclear fusion is when |
Two lighter atoms such as hydrogen are combined into a heavier elements such as helium |
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the majority of stars spend their “lives” as what type? |
main sequence |
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Only massive stars will explode in a _________ and become a ________ ___________ |
supernova |
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Stars similar in mass to the Sun will end up as a.... |
White Dwarf |
