Term
Kepler's first law states that a planet moves around the Sun in a(n)
-elliptical orbit, with the Sun at one focus.
-circle, with the Sun at the center.
-elliptical orbit, with the Sun at the center of the ellipse.
-elliptical orbit, with the Sun on the minor axis of the ellipse |
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Definition
| elliptical orbit, with the Sun at one focus. |
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Term
The eccentricity of a planet's orbit describes
-how different its orbital path is from a perfect circle.
-its tilt with respect to the plane of the Earth's orbit (the ecliptic plane).
-its motion at any specific point in its orbit as seen from the Earth, that is, whether direct, retrograde, or stationary.
-the tilt of the planet's spin axis with respect to its orbital plane. |
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Definition
| how different its orbital path is from a perfect circle. |
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Term
Kepler's second law states that a planet moves fastest when it
-is closest to the Sun.
-is farthest from the Sun.
-is at conjunction.
-passes through the minor axis. |
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Definition
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Term
Kepler's third law can be described in which of the following ways?
-The smaller the orbit of a planet, the longer the planet takes to complete one revolution.
-The larger the orbit of a planet, the longer the planet takes to complete one revolution.
-The smaller the radius of a planet, the more rapidly it rotates on its axis.
-The time to complete one revolution of its orbit depends on the size or radius of the planet. |
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Definition
| The larger the orbit of a planet, the longer the planet takes to complete one revolution. |
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Term
I have a massive purple object in my laboratory. If I were to take it to the Moon, which of its characteristics would be guaranteed to change?
-mass
-density (mass per unit volume)
-color
-weight |
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Definition
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Term
How much gravitational force acts on an astronaut in the Space Shuttle in a circular orbit 300 km above the Earth's surface? (note that the Earth's surface is about 6000 km from the center of the Earth)
-a little bit less than when the astronaut is standing on the surface of the Earth
-zero—the astronaut is weightless
-exactly the same as when the astronaut is standing on the surface of the Earth
-a little more than when the astronaut is on the surface of the Earth |
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Definition
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