Paleoclimatic Changes – Flashcards
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1. atmosphere 2. climate 3. Greenhouse Effect 4. outgassing 5. Pangaea
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4. to lose gases into the atmosphere 3. warming of the atmosphere caused by gases that absorb heat from Earth's surface 5. supercontinent which connected the landmasses of the southern and northern hemispheres 2. long-term weather patterns of a particular area 1. the gaseous envelope of a planet
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Select all of the answers that apply. Today's atmospheric functions include _____.
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-sustaining life with oxygen -filtering harmful rays from the Sun -helps to protect Earth from meteor collisions
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Select all of the answers that apply. The early atmosphere on Earth was _____.
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-mostly carbon dioxide -poisonous -extremely hot
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Volcanoes created the initial oxygen in the atmosphere.
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False
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Select all of the answers that apply. In order to study the earth's climate history, scientists analyze _____.
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-ice cores and rock records -fossils of plants and animals
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There are many theories as to why ice ages occur. The currently accepted theory is that ice ages are caused by _____.
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small changes in Earth's orbit
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The climate of the earth throughout history has always _____.
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fluctuated between hot and cold periods
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The last "hot house" or period of increased temperature occurred _____.
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during the time of the dinosaurs
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Climate changes have been linked to almost all mass extinctions of life on Earth.
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True
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Humans have no impact on the climate.
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False
