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19 Cards in this Set
- Front
- Back
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Earth's Shape?
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oblate Spheroid
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How do ships show Earth's shape?
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while travelling, the bow of the ship disappears over the horizon first. If the earth was flat, the whole ship would leave the range of sight at the same time.
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How do stars show Earth's shape?
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as you move farther north or south, stars appear lower in the sky.
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Polaris is also called
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the north star
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Formula of gravity
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Force = (Mass 1 x Mass 2) / distance^2
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When leaving the force of Earth's gravity your ________ changes but your ________ stays the same.
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weight
mass |
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How does earth shape affect the force of gravity?
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_
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Eratosthenes Experiment: (formula)
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angle/360 = distance on the surface/circumference
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What was the purpose of Eratosthenes Experiment?
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To determine the Earth's size
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3 basic layers of earth
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The lithosphere, the hydrosphere, the atmosphere
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lithosphere
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rock layer
(litho means rock) |
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Hydrosphere
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water layer
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atmosphere
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gas layer
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Topographic maps
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scale model of the earth's surface; used to show the three-dimensional features of the surface
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Field Maps
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a region of space with a measurable quantity at every point. A field map is commonly used to show pressure, temperature or elevation.
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isolines
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lines connecting areas of = value
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isobars
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lines connecting areas of = Pressure
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isotherms
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lines connecting areas of = temperature
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As the lines are drawn closer to each other, the gradient _____________.
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increases
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