9 terms

Motion

An object is in motion if it's distance from another object is changing.

Reference Point

Is a place or object used for comparison to determine if something is in motion.

International System of Units

Scientists use SI units to describe the distance an object moves.

Meter

A meter is a little longer than a yard. The SI unit of length is the meter.

Average Speed

To calculate average speed, divide the total distance traveled by the total time.

Instantaneous Speed

Instantaneous speed is the rate at which an object is moving at a given instant in time.

Velocity

When you know both the speed and direction of an object's motion, you know the velocity of the object. Speed in a given direction is called velocity.

Slope

The steepness of a line on a graph is called a slope. The slope tells you how fast one variable changes in relation to the other variable in the graph.

Speed

The speed of an object is the distance the object travels per unit.