Millions or billions of stars, as well as gas and dust,

are all held together by gravity in formations called ____________.

• galaxies

• planets

• solar systems

• disks

Tags

NGSS.MS-ESS1-2

A _______________ is a rotating cloud of gas and dust. The solar system formed from a solar nebula.

• Solar nebula

• Solar System

• Galaxy

• Universe

A ________ is a small shift in the EM spectrum of an object in space toward longer wavelengths, or the red end of the spectrum.

• Redshift

• Blueshift

• Power shift

• Late shift

Tags

NGSS.HS-ESS1-2

NGSS.HS-PS4-1

Terrestrials are composed primarily of rock and metal, making them highly _______.

• dense

• gaseous

• transitioning

• toxic

Tags

NGSS.MS-ESS3-1

NGSS.MS-PS1-1

________________ are small, rocky objects in orbit around the sun. In the asteroid belt, they travel at a speed of approximately

18 km/s.

• asteroids

• meteors

• comets

• planets

Tags

NGSS.MS-ESS1-3

Who developed the first detailed heliocentric model of the solar system?

• Copernicus

• Einstein

• Hubble

• Kepler

_______________ developed the first detailed heliocentric model of the solar system.

• Copernicus

• Einstein

• Hubble

• Kepler

All space, matter, and energy that exist, that have existed, and that will exist.

• Solar System

• Universe

• Planet

• Oort cloud

Tags

NGSS.MS-ESS1-2

How does Ptolemy's model of the universe compare (alike) with Aristotle's model?

• Planets have circular orbits

• Planets have elliptical orbits

• Planets are square

• Planets have triangular orbits

Which of the following consists mostly of small bodies of ice located just beyond Neptune's orbit?

• Neptune

• Saturn

• Jupiter

• Uranus