Unit 9 Lesson 2: Gravity and the Universe

Front

What is the nebular hypothesis?

Back

A theory that suggests the solar system formed from a cloud of gas and dust.

Front

Who proposed the nebular hypothesis?

Back

Kant

Front

What does it mean to simulate an event in science?

Back

To create a model that replicates the conditions and outcomes of an event.

Front

Why do planets orbit the sun instead of Earth?

Back

Because the sun has more mass.

Front

Who refined Kant's nebular hypothesis?

Back

Laplace

Front

What is a planetary system?

Back

A system consisting of objects (planets, and a star or stars) held together by gravity.

Front

What is gravity?

Back

A force that attracts two bodies towards each other.

Front

What role does mass play in gravity?

Back

The greater the mass of an object, the stronger its gravitational pull.

Front

What is the Milky Way?

Back

A spiral galaxy that contains our solar system.

Front

What is a star?

Back

A massive, luminous sphere of plasma held together by gravity, undergoing nuclear fusion.