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Chapter 3
Study guide
Gravity:
• Definition• What affects gravity• How air resistance and surface area affect the
force of gravity• What happens to objects when dropped in a
vacuum (no air)• Free fall means the object is weightless so the
force of gravity would be equal on the object and Earth.
Weight:
• Definition• Units used to measure weight• Can it change?
Mass:
• Definition• Tool used to measure mass• Units used to measure mass• Can it change?
Friction:
• Definition• Know the 4 types and what they are (be able to
identify by examples)• Know that friction produces heat
Pressure:
• Know what happens to pressure below and above sea level (does it increase? decrease?)
• Units used to measure pressure• Formula for pressure
Buoyancy:
• Definition• Bernoulli’s Principle (what is states and examples)• Pascal’s Principle (what it states and examples)
Density:
• Formula• Units• What happens when an object is placed in a
substance that is more dense and less dense?
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