Historical Models and Gravity

Historical Models and Gravity

Multiple Choice

What is a scientific theory?

• Describes what happens

• Explains a process

Multiple Choice

What is a scientific law?

• Describes what happens

• Explains a process

Multiple Choice

Scientific theories are based on?

• general assumptions of how systems work.

• mathematical principles that can be proven true.

• large amounts of data collected over time.

• observations from within only one scientific discipline.

Multiple Choice

What does the prefix "geo" mean?

• Star

• Sun

• Earth

• Center

Multiple Choice

What does the prefix "helio" mean?

• Earth

• Sun

• Center

• Ground

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​​A planet's orbital speed changes, depending on how far it is from the Sun.

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The closer a planet is to the Sun, the stronger the Sun's gravitational pull on it, and the faster the planet moves.

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The farther it is from the Sun, the weaker the Sun's gravitational pull, and the slower it moves in its orbit.

​Keplers Law of Planetary Motion

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Multiple Choice

What two things determine the gravity of an object?

• mass & weight

• mass & distance

• density & mass

• volume & distance

Multiple Choice

Which model has greater gravitational attraction (if any)

• Model A

• Model B

• Both Model A and Model B (same gravity)

Note: Weight and MASS are DIFFERENT!

Multiple Choice

Which statement about gravity is true?

• gravity causes objects to pull towards one another

• gravity causes objects to push away from each other

• gravity only takes place between planets

• the moon doesn't have any gravity

Multiple Choice

When will the forces of gravity between two objects be the GREATEST?

• when the masses of both objects are small and the objects are far apart

• when the masses of both objects are large and the objects are close together

• when the masses of both objects are small and the objects are close together

• when the masses of both objects are large and the objects are far apart