Lesson 7: Earth-Moon-Sun System Answers
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Which quantities decrease as the distance between a planet and the Sun increases? Check all that apply.tangential speedmassgravitational forcearea swept out in a daydistance traveled in a day
A
tangential speedB
massC
gravitational forceD
area swept out in a dayE
distance traveled in a day2
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The solar mass of the Sun is 1. The orbital period of Jupiter is 11.9 Earth years.
A
5.2 AUB
41 AUC
52 AUD
410 AU3
Based on Kepler’s work, which best describes the orbit of a planet around the Sun?
A
a circle with the Sun at the very centerB
an ellipse with the Sun at the very centerC
a circle with the Sun at one edgeD
an ellipse with the Sun at one focus4
To solve a problem using the equation for Kepler’s third law, Enrico must convert the average distance of Mars from the Sun from meters into astronomical units.
A
multiply the average distance by 1.5 × 1011B
multiply 1.5 × 1011 by the average distanceC
divide the average distance by 1.5 × 1011D
divide 1.5 × 1011 by the average distance5
The image shows how Earth orbits the Sun. Points W and X are the same distance from the Sun.
A
Earth is speeding up at W and slowing down at X because the force on Earth is greater at W than at X.B
Earth is slowing down at W and speeding up at X because the force on Earth is greater at W than at X.C
The speed of Earth is the same at W as at X because the force on Earth is the same at W as at X.D
The speed of Earth is greater at W than at X because the force on Earth is greater at W than at X.Did you find these answers helpful?
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