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Motion, Forces, and Energy
Unit 1: Gravity & Motion Lessons 4 & 5 ONLY
9
Science
7th Grade
03/28/2019

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Term
Gravity
Definition
This is a force of attraction between objects due to their mass.
Term
Free fall
Definition
This is when gravity is pulling an object down and no other forces are acting on it.
Term
Orbit
Definition
This is when an object travels around another object in space.
Term
Fluid
Definition
This is any material that can flow and takes the shape of its container.
Term
Pressure
Definition
This is the measure of how much force is acting on a certain area.
Term
Pascal
Definition
This is the SI ( International System of Units) unit for pressure.
Term
Atmospheric pressure
Definition
This is the pressure caused by the weight of the atmosphere.
Term
Buoyant force
Definition
This is an upward force that fluids exert on all matter.
Term
Archimedes' principle
Definition
This states that the buoyant force acting on an object in a fluid is an upward force equal to the weight of fluid that an object displaces.
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