Unit 4, LS2 Quizizz Check-In Kepler's Laws of Planetary Motion

Which of the following are inner planets of the solar system? (Choose ALL that apply!)

• Jupiter

• Mars

• Earth

• Saturn

• Venus

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Kepler's First Law of Planetary Motion states that the shape of a planet's orbit is...

• egg-shaped.

• a perfect circle.

• an ellipse.

• a parabola.

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An ellipse has _______ foci.

• 1

• 2

• 3

• 4

According to Kepler's first law of planetary motion, what is at one of the foci of the orbit of a planet?

• a black hole.

• the sun.

• the moon.

• the Earth.

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According to Kepler's Second Law of Planetary Motions...

• planets speed up when they are closer to the sun.

• planets slow down when they are closer to the sun

• planets always travel at the same speed as they orbit.

• planets constantly change their speed depending on their position in the galaxy.

The time it takes for a planet to complete one orbit around the sun is called...

• a period of rotatoin.

• a period of revolution.

• a month.

• a day.

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The time it takes for a planet to complete one rotation on its axis is called...

• a period of rotatoin.

• a period of revolution.

• a month.

• a year.

Earth's period of revolution is...

• 23 hours and 56 minutes.

• 365.25 days.

• 88 days.

• 224 days.

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The longest distance across an ellipse is called...

• the semi-major axis.

• the major axis.

• the minor axis.

• the diameter.

An astromical unit (AU) is...

• the distance between the Earth and the sun.

• the distance between the Earth and the moon.

• the distance between the sun and Neptune (outermost planet).

• how far the sun travels in one year.

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