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26 Cards in this Set
- Front
- Back
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What is a rotation? |
Earth turning on its axis |
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Earth moving around the sound is known as what? |
A revolution |
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If the planet is closer to the sun, is the revolution longer or shorter? |
The revolution is shorter |
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What is the reason we have seasons? |
Earths tilted axis |
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What does a waning gibbous look like? |
A sliver on the right side of The moon |
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What does a new moon look like? |
You cannot see the moon |
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What causes a spring tide? |
The sun and the moon pulling at The oceans on opposite side of the earth |
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Why is a spring tide not as strong as a neap tide? |
Because in a spring tide the moon and sun are pulling in opposite direction |
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What is geocentric? |
When everything is rotating around the earth |
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What does heliocentric mean? |
When everything is revolving around the sun |
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What is on the x axis of an H & R diagram? |
Temperature |
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What is the name of a star if it has a low luminosity and high temperature? |
White dwarf |
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What can determine the stars color, composition, temp, and mass? |
Star spectra or light energy |
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What four things can the star spectra determine? |
The stars color, composition, temp, and mass |
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What is the 3 main types of galaxies? |
Elliptical, sprial, and irregular |
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What is the order of the universe from large to small ? |
Universe, galaxy, solar system, planets |
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What are theain differences between the big bang theory and the protoplanet hypothesis? |
Big bang theory- huge explosion that created the universe Protoplanet hypothesis- started out the size of a pea/marble |
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Why do they think our universe is expanding? |
Light shifting toward red end of the light spectrum |
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How do all stars begin? |
In a nebula |
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What is a nebula? |
Dust and gas |
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What determines a stars life cycle? |
The stars mass |
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What path does a high mass star take? |
Nebula-highmass protostar-highmass star-supergiant-supernova-either neutron star or black hole |
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How is the electromagnetic spectrum organized by? |
Wavelength |
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When does gravity in space increase? |
When objects are large and close together |
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What does H and r stand for in the H&R diagram? |
Hertzsprung-Russel |
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What is the difference between a crescent and a gibbous? |
Crescent is the first quarter and closer to the new moon, gibbous is the closest to a full moon |
