Ch. 2 Study Game 2022: Stars, Galaxies, & the Universe

Front

What is an Irregular Galaxy?

Back

An Irregular Galaxy is a type of galaxy that does not have a distinct regular shape, unlike spiral or elliptical galaxies. They often appear chaotic and are rich in gas and dust.

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What unit of measurement do astronomers use for distances outside of our Solar System?

Back

Astronomers use light-years to measure distances outside of our Solar System. One light-year is the distance that light travels in one year.

Front

Where is Earth located in the Milky Way Galaxy?

Back

Earth is located in the Milky Way Galaxy, specifically in one of its spiral arms, known as the Orion Arm.

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What is a Spiral Galaxy?

Back

A Spiral Galaxy is a type of galaxy characterized by its spiral shape, with arms that wind outward from the center. The Andromeda Galaxy is an example of a spiral galaxy.

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What is Gravity?

Back

Gravity is a force that attracts two bodies towards each other. It is responsible for keeping planets in orbit around stars and stars grouped together in galaxies.

Front

What is the Milky Way Galaxy?

Back

The Milky Way Galaxy is the galaxy that contains our Solar System. It is a barred spiral galaxy and is estimated to contain 100 to 400 billion stars.

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What is a Light-Year?

Back

A light-year is a unit of distance that represents how far light travels in one year, approximately 5.88 trillion miles (9.46 trillion kilometers).

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What is an Elliptical Galaxy?

Back

An Elliptical Galaxy is a type of galaxy that has an oval shape and lacks the distinct arms of spiral galaxies. They are often composed of older stars.

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What is the Big Bang Theory?

Back

The Big Bang Theory is the leading explanation for the origin of the universe, suggesting that it began as a singularity and has been expanding ever since.

Front

What is Inertia?

Back

Inertia is the property of matter that causes it to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a force.