Astronomy and Kepler's Laws Worksheet

Choose the correct question. The orbit of a planet is an ellipse with the Sun at one of the two foci.

• What is Kepler’s First Law?

• What is Kepler’s Second Law?

• What is Kepler’s Third Law?

• What is Law of Copernicus.

The square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its orbit. a. What is Kepler’s First Law? b. What is Kepler’s Second Law? c. What is Kepler’s Third Law? d. What is orbital period?

• What is Kepler’s First Law?

• What is Kepler’s Second Law?

• What is Kepler’s Third Law?

• What is orbital period?

According to the diagram, most stars are ____.

• White dwarfs

• Main sequence

• Giants

• Supergiants

H II regions glow because:

• they are heated by nearby stars.

• they reflect light from other sources.

• they are made of glowing gases.

• they are remnants of supernova explosions.

H II regions are also called [ ]

• Stellar nurseries

• Supernovae

• Cosmic clouds

• Protostellar regions

The Sun has a mass of

• 1/10 of a solar mass

• 1 solar mass

• 10 solar masses

• 100 solar masses

What is a protoplanetary disk?

• Leftover gas from a star’s formation; a viable birthplace for planets

• A stellar nursery for smaller (G-M) stars

• A gas disk that absorbs planets to grow, forming a young star

• An optical illusion created by UV light refracting through nebulae

Which of the following are characteristics of the red giant branch? Select all that apply.

• Decreasing luminosity

• Increasing luminosity

• Decreasing surface temperature

• Increasing stellar radius

• Increasing surface temperature

Which principle in quantum mechanics explains the support mechanisms for white dwarfs and neutron stars?

Identify the star.

• Red Giant

• White Dwarf

• Main sequence

• None of the above