chapter 3 study guide

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Chapter 3
Study guide
Gravity:
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•
•
•
•
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:
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•
•
•
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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