Kepler's Planetary Laws

What is the shape of Earth's orbital path around the Sun according to Kepler's laws?

• Perfectly circular

• Nearly circular

• Highly elliptical

• Square

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NGSS.HS-ESS1-4

NGSS.HS-PS2-4

According to Kepler's first law, what is the shape of the orbit of a planet around the Sun?

• Circle

• Ellipse

• Parabola

• Hyperbola

Kepler's second law is also known as the law of:

• Ellipses

• Equal areas

• Harmonies

• Universal gravitation

Which of the following best describes the relationship between a planet's orbital speed and its distance from the Sun according to Kepler's second law?

• The speed is constant regardless of distance.

• The speed increases as the distance increases.

• The speed decreases as the distance increases.

• The speed is unrelated to the distance.

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NGSS.HS-ESS1-4

Explain why a comet's speed changes as it travels along its orbit.

• Due to changes in its mass.

• Because of Kepler's second law, which states that a line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

• Because of the gravitational pull from other planets.

• Due to the comet's rotation.

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NGSS.MS-PS2-4

NGSS.MS-PS3-5

What is the significance of the semi-major axis in an elliptical orbit?

• It determines the color of the planet.

• It is the longest diameter of the ellipse and is used in Kepler's third law to calculate the orbital period.

• It is the shortest diameter of the ellipse.

• It has no significance.

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NGSS.HS-ESS1-4

How does Kepler's second law affect the design of space missions to other planets?

• It is not considered in mission design.

• It helps in calculating the fuel needed for constant speed.

• It is used to plan the trajectory and timing of spacecraft to ensure efficient travel by considering varying speeds.

• It determines the color of the spacecraft.

Tags

NGSS.HS-ESS1-4

What does Kepler's first law state about the nature of planetary orbits?

• They are circular.

• They are elliptical with the Sun at one focus.

• They are hyperbolic.

• They are parabolic.

How does the orbital speed of a planet change as it moves closer to the Sun according to Kepler's laws?

• The speed decreases.

• The speed becomes zero.

• The speed remains constant.

• The speed increases.

What is the primary factor that determines the shape of a planet's orbit according to Kepler's first law?

• The planet's speed

• The gravitational pull of the Sun

• The distance from the Sun

• The planet's mass