Astronomers Review

This astronomer confirmed the heliocentric theory with his telescope.

• Galileo
• Kepler
• Copernicus
• Aristotle

This astronomer discovered Jupiter's four moons

• Copernicus

• Galileo

• Brahe

• Aristotle

This astronomer was convinced this image was accurate.

• Ptolemy
• Brahe
• Copernicus
• Galileo

Using Tycho Brahe's data, this astronomer discovered that the planets orbit in an oval shape called an ellipse.

• Kepler

• Ptolemy

• Copernicus

• Aristotle

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What is the heliocentric theory?

• There is no sun
• The sun is smaller than the Earth
• The sun is the center of the universe
• The Earth in the center of the universe

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What forces cause a planet to orbit?

• gravity and orbit
• gravity and inertia
• gravity and mass
• gravity and weight

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On Earth, which has a greater gravitational force acting on it?

• an iPhone
• a laptop
• a dog
• a car

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What would happen to the planets in the solar system if the sun’s gravitational force were to suddenly disappear?

• They will stop moving and remain still.

• They will stop spinning.

• They will fly away in straight lines.

• They will start moving toward the Sun

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Which planet has the greatest attraction to the sun?

• Mercury
• Venus
• Earth
• Mars

Which force in the Solar System is similar to the tension on the string?

• Friction

• Inertia

• Force

• Gravity

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