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Chapter 2-PhysScienc

Chapter Two Physical Science Test vocabulary

QuestionAnswer
speed a measure of how far something travels in a certain period of time.
velocity a measure of speed in a certain direction.
inertia the tendency of an onject to stay at rest or to remain in motion unless an outside force causes a change.
gravity a force that acts to pull pairs of objects together.
mass the amount of matter in an object.
weight the force gravity exerts on an object's mass.
acceleration rate of change in speed or direction of movement.
friction a force that resists the movement of one surface past another surface.
air resistance friction caused by gas molecules in the air hitting an object and slowing it down.
streamline to design smooth, rounded surfaces on an object so it slips through the air with the least possible resistance.
reaction action and reaction forces work together. they work with equal stregnth in opposite directions.
force a push or a pull
Created by: llabossi
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