CH. 8 Astronomy quiz (pt. 2)

What is the orbital period for a planet whose orbit has a semimajor axis of 4 AU?

• 2 years
• 4 years
• 8 years
• 16 years

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NGSS.HS-ESS1-4

Which of the following is NOT one of Kepler’s Laws of Motion for orbiting bodies?

• An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
• A planet orbits the Sun in an ellipse, with the Sun at one focus of the ellipse.
• A line connecting a planet to the Sun sweeps out equal areas in equal time intervals.
• P^2= a^3, where P is the orbital period of the planet in years and a is the average distance of the planet from the central star in astronomical units (AU).

Which is the most important factor in determining how long a star will live?

• color
• temperature
• composition
• mass

Planets are believed to form

• at the same time as the stars they orbit.
• millions of years after the stars they orbit.
• only around stars just like the Sun.
• around every star in the universe.

Where did the heavy elements that make up the bulk of Earth originate?

• supernova
• meteorites
• the Big Bang
• the Sun

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NGSS.HS-ESS1-3

Which of the following best describes half-life?

• Half the time it takes for the all of the nuclei in a sample of a radioactive isotope to decay.
• The time it takes for the nucleus of one atom of a radioactive isotope to split in half.
• The time if takes for half of the nuclei in a sample of a radioactive isotope to decay.
• The time it takes for the nucleus of one atom of a radioactive isotope to decay.

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NGSS.HS-PS1-8

If radioactive isotopes in a rock have undergone two half-lives, what percentage of the original sample of radioactive isotope remains?

• 2%
• 20%
• 25%
• 50%

Which “stage of life” do all stars experience?

• supernova
• protostar
• red giant
• red dwarf

What are the final “life stages” of low-mass, Sun-like stars?

• Red Giant, Planetary Nebula, White Dwarf
• Red Giant, Supernova, Neutron Star
• Red Dwarf, White Dwarf
• Blue Supergiant, Supernova, Black Hole

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NGSS.HS-ESS1-1

Which of the following is NOT in our solar system?

• A high-mass star
• Terrestrial planets
• Asteroids
• Pluto

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NGSS.MS-ESS1-3