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5 Cards in this Set
- Front
- Back
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The ______ hypothesis states that the extinction of the dinosaurs was facilitated by an large _______ hitting Earth.
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Alvarez, asteroid
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__________ _________ are small crystallized minerals found throughout Earth’s crust.
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Zircon Crystals
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Early life on Earth is hypothesized to be similar to life surrounding _________ in the deep oceans, where energy from hydrogen sulfide is used.
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Hydrothermal vents
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The amount of oxygen in our current atmosphere is a result of billions of years of photosynthesis by ___________.
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cynanobacteria
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The magnetic field of Earth protects us against the ________ which is radiation given off by our sun.
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Solar Wind
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