Exploring the Universe Vocabulary Review

an attractive force that exists between all objects that have mass.

• Comet

• nebulae

• Gravity

• 
  Ellipse

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

NGSS.MS-PS2-5

a huge collection of stars, gas, and dust.

• solar system

• galaxy

• planet

• comet

Tags

NGSS.MS-ESS1-2

a cloud of gas and dust where stars and whole solar systems are born.

• galaxy

• solar system

• nebulae

• comet

an oval-shaped path, like a slightly elongated circle.

• nebulae

• aphelion

• perihelion

• ellipse

two or more small nuclei combine to form a single larger nucleus, a neutron, and a tremendous amount of energy.

• nuclear fusion

• perihelion

• aphelion

• gravity

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

the point where a planet is furthest from the sun in its orbit

• Aphelion

• Galaxy

• Solar System

• Perihelion

the point where a planet is closest to the sun in its orbit.

• Aphelion

• Galaxy

• Solar System

• Perihelion

an object that orbits a planet or something else that is not a star.

• comet

• asteroid

• moon

• meteoroid

Tags

NGSS.MS-ESS1-2

Chunks of rock and ice that never clumped together like the rocks and ice that formed the other planets

• comet

• asteroid

• moon

• meteoroid

Tags

NGSS.MS-ESS1-3

Mixtures of rock, ice, and dust that are loosely held together by the gravitational attractions among the particles

• comet

• asteroid

• moon

• meteoroid