Comparing Stars and Planets

Alex is showing his friend what he learned about comparing the objects of space by their relative sizes. If “W” represents the universe, what would “X” most likely represent?

• A solar system because it contains planets and stars.

• A nebula because that is what the planets formed from.

• A galaxy because it contains billions of stars and the planets.

• A universe because it contains billions of stars and the planets.

Tags

NGSS.MS-ESS1-3

If two stars are 100 light-years apart, what does that mean?

• It would take 100 years for a spaceship to travel between these two stars.

• It takes 100 years for light to travel from one star to the other.

• One of the stars formed 100 years before the other.

• The stars are 100 million kilometers from each other.

Gustavo is doing a presentation in class comparing the objects of space by their relative sizes. If “Z” represents a planet, what would “Y” most likely represent?

• A solar system because it contains planets and stars.

• A nebula because that is what the planets formed from.

• A galaxy because it contains billions of stars and the planets.

• A universe because it contains billions of stars and the planets.

Tags

NGSS.MS-ESS1-3

If “Z” represents a planet, what would “X” most likely represent?

• A solar system because it contains planets and stars.

• A nebula because that is what the planets formed from.

• A galaxy because it contains billions of stars and the planets.

• A universe because it contains billions of stars and the planets.

Which of the following is a primary difference between stars and planets?

• Stars emit their own light, while planets reflect light.

• Stars are always larger than planets.

• Stars have atmospheres, while planets do not.

• Stars are made of solid materials, while planets are gaseous.

What is the main source of energy for stars?

• Nuclear fusion

• Chemical reactions

• Gravitational contraction

• Solar wind

Tags

NGSS.HS-ESS1-1

Which of the following statements is true about the orbits of planets and stars?

• Planets orbit stars, while stars orbit the center of galaxies.

• Stars orbit planets, while planets orbit the center of galaxies.

• Planets and stars both orbit the center of galaxies.

• Stars orbit each other, while planets do not orbit anything.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

How do astronomers determine the composition of a star?

• By analyzing the light spectrum emitted by the star

• By measuring the star's temperature

• By observing the star's size

• By calculating the star's distance from Earth

Tags

NGSS.HS-ESS1-2

NGSS.HS-ESS1-3

Which of the following best describes a planet?

• A celestial body that orbits a star and does not emit its own light

• A celestial body that emits its own light and heat

• A massive body of gas undergoing nuclear fusion

• A small rocky body orbiting the Sun

What is the primary factor that determines whether a celestial body is classified as a star or a planet?

• Its ability to undergo nuclear fusion

• Its distance from the Sun

• Its size

• Its gravitational pull