Define mass, volume, and density and how they differ

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Explain what determines the strength of gravity

Explain Kepler’s first two laws of planetary motion
Describe Newton’s three laws of motion
Define mass, volume, and density and how they differ
Explain what determines the strength of gravity
Explain how an object (such as a satellite) can be put into orbit around Earth
Explain how an object (such as a planetary probe) can escape from orbit