Theories, Place in Universe, Gravity and Inertia

What is at the middle of a Heliocentric system?

• Mars

• Moon

• Sun

• Earth

What is at the middle of a Geocentric system?

• Sun

• Neptune

• Earth

• The Universe

Who supported the Geocentric system?

• Ptolemy

• Aristotle

• Copernicus

• Galileo

Who proposed the Heliocentric system?

• Copernicus

• Ptolemy

• Aristotle

• Galileo

What does the Geocentric system look like?

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What does the Heliocentric system look like?

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What is the biggest difference between the Geocentric Model and the Heliocentric Model?

• the shape of the planets' orbits

• the movement of the moon

• the center of the solar system

Which scientific instrument did Galileo use to change the world?

• telescope

• spyglass

• mirror

• magnifying glass

Who discovered the shape of a planet's orbit is actually an ellipse?

• Ptolemy

• Copernicus

• Kepler

• Galileo

Kepler's first law states that the orbits of the planets are in the shape of a/an...

• perfect circle

• ellipse

• spiral