Earth Science-Essay Questions-Semester 1

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What are three kinds of periodic changes that occur in the way the earth moves around the sun?
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Orbit- Circular changes Tilt- Degree changes Precision- Circular motion changes
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How would an increase in the amount of solar energy reaching the earth’s surface most likely affect sea level along the coastline of the United States?
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Increase in heat —> Melting of Ice Increase in water —> Results in coastal flooding
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Explain how a snowfield becomes a glacier.
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Snow accumulates Firn Weight of accumulating snow causes movement Glacier
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What are the factors that affect the local water budget?
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Temperature Vegetation Wind Duration/Amount of Precipitation
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Describe 4 Farming methods
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Contour-Circular brands Strip Contouring-Alternating bands Cerrocine-Step like ridges that follows field’s contours. Crop Rotation-Has different crops each year.
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How do the Richter and Mercalli scales differ?
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Richter-Magnitude Mercalli-Intensity
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What is the relationship between the focus and the epicenter of the earthquake?
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Focus-Right above Epicenter
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Why are gnomonic projections useful to navigators in plotting routes used in air travel?
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Great circles-shortest distances Show up as straight lines on the projection
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Explain why quartz is harder than feldspar.
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Quartz is much denser therefore higher on the Mohs scale than feldspar.
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Explain the meanings of the terms mixture and solution.
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Mixture-Two or more substances that are not chemically combined. Solution-One substance is dispersed in another substance.

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