Science Chapter 15 Lesson 1

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Science Chapter 15 Lesson 1 Gravitational effects

Lesson 1 Vocabulary force gravity A push or pull that causes an object to move, stop, or change direction The use of force to move an object through a distance The pulling force between all objects; the force that causes objects to fall toward Earth force work gravity

Lesson 1 Vocabulary weight Spring scale motion A measure of the downward force of gravity on an object A tool used to measure weight of an object according to the pull of gravity The change in an object’s position The measure of speed and direction weight Spring scale motion velocity

Lesson 1 Vocabulary speed inertia The measure of the distance an object moves in a set amount of time; like 65 miles per hour A change in velocity (speed or direction The tendency of an object to resist a change in motion The force from 2 or more objects rubbing against each other; 2 hands rubbing; feet rubbing on carpet speed acceleration inertia friction

Lesson 1 Vocabulary newton The unit to measure force Force exerted by a body moving through air because of friction; like sky diving A tool that uses weights to determine the mass of an object newton Air resistance balance