CH. 8 quiz

1 . What is the orbital period for a planet who orbits at a distance of 4 AU?

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

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NGSS.HS-ESS1-4

2 . 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).

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NGSS.HS-ESS1-4

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

• color
• temperature
• composition
• mass

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NGSS.HS-ESS1-1

7 . Which of these statements about Kepler’s Laws is true?

• A planet moves most rapidly when its orbit takes it closest to the Sun.
• The time that is required for a planet to complete an orbit is proportional to the square of its radius.`
• Planets orbit clockwise around the Sun.
• Planets travel in circular orbits.

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NGSS.HS-ESS1-4

9 . Which of the following does NOT happen during radiometric decay?

• The mass of the atom decreases.
• One type of element changes into another type of element.
• The nuclei of radioactive isotopes stay the same.
• Radiation is released.

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NGSS.HS-PS1-8

10 . 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.

12 . 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%

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NGSS.HS-PS1-8

13 . The half-life of radioactive Carbon-14 is 5730 years. If you have 100 grams of Carbon-14 today, approximately how much will remain 18,000 years later?

• 50 grams
• 12 grams
• 6 grams
• 3 grams

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NGSS.HS-PS1-8

14 . Which “stage of life” do all stars experience?

• supernova
• protostar
• red giant
• red dwarf

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NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

16 . Which of the following is NOT in our solar system?

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