Cosmic Phenomena

Which of the following statements is true about the relationship between galaxies and stars?

• A galaxy contains many stars.

• A star contains many galaxies.

• A star contains only one galaxy.

• A galaxy contains only one star.

Which list correctly orders the celestial bodies from smallest to largest?

• Earth, Milky Way Galaxy, Solar System

• Earth, Solar System, Milky Way Galaxy

• Solar System, Milky Way Galaxy, Earth

• Milky Way Galaxy, Solar System, Earth

Tags

NGSS.MS-ESS1-3

What is a light-year and why do scientists use it?

• A light-year is the distance light travels in one year and is used to measure very small distances.

• A light-year is the distance light travels in one year and is used to measure very large distances.

• A light-year is the time it takes light to travel from the Sun to Earth and is used to measure very small distances.

• A light-year is the time it takes light to travel from the Sun to Earth and is used to measure very large distances.

Which sequence correctly puts the colors of stars in order from coldest to hottest?

• blue, white, red, yellow

• yellow, red, white, blue

• red, yellow, white, blue

• red, white, blue, yellow

If it takes 4 days to travel to the moon, how long would you expect it to take to travel to Mars?

• six hours

• six days

• six months

• six years

An astronomer studies an image taken by a satellite in space and sees an area of gas, dust, and many stars distributed along spiral arms. What is the astronomer most likely seeing?

• a comet

• a galaxy

• a solar system

• an asteroid belt

Tags

NGSS.MS-ESS1-2

Based on the information on the graph, which statement is correct?

• The more massive a planet is, the lower its orbital velocity.

• The more massive a planet is, the higher its orbital velocity.

• The closer a planet is to the Sun, the lower its orbital velocity.

• The farther a planet is to the Sun, the lower its orbital velocity.

Tags

NGSS.HS-ESS1-4

If the absolute brightness of a star changes, all but one of the following properties must change as well. Which of the following will NOT change?

• the star's absolute magnitude

• the rate at which the star uses nuclear energy

• the distance from the star to Earth

• the rate at which the star releases electromagnetic energy

How does the composition of a comet compare with that of a star?

• Both objects are composed of gas.

• Both objects contain a form of water.

• Comets are made of ice and dust, while stars are made of gas.

• Comets are made of frozen rock, while stars are made of burning rock.

If a scientist sends light waves to four different objects in space, which of the following will take the longest to bounce the wave back to Earth? (which is the farthest away)

• a star in the Milky Way Galaxy

• a star in the Andromeda Galaxy

• a planet in Earth's Solar System

• a planet in another star system within the Milky Way Galaxy

Tags

NGSS.MS-ESS1-3