Ch 11 Lesson 1--Motion

position

The location of an object. Example: The __ on the map showed where the boat was.

grid

A pattern of lines used to show locations. Example: I used the __ to find the point quickly.

axis

A numbered line on a graph. Example: The dot lined up with 5 on the __.

motion

A change in position over time. Example: The slow __ of the turtle was easy to see.

distance

How far something moves. Example: We measured the __ the ball rolled on the floor.

direction

The way something moves or points. Example: The arrow showed the __ the runner went.

frame of reference

What you use to describe motion. Example: From the bus, my __ made trees seem to move.

speed

How fast something moves. Example: The skater increased her __ near the end.

time

How long something takes. Example: We recorded the __ it took to run one lap.

velocity

Speed in a certain direction. Example: The wind changed the kite’s __ during the turn.

line graph

A graph that shows change over time. Example: Our __ showed distance changing each second.

data

Information collected from measurements. Example: We wrote the __ in a table for class.

measure

To find the size or amount. Example: We __ the desk using a meter stick.

units

Standard amounts for measuring. Example: The answer needs __ like meters and seconds.

acceleration

A change in velocity over time. Example: The cart’s __ increased when I pushed harder.

decelerate

To slow down. Example: The bike will __ as it reaches the stop sign.

momentum

Mass times velocity, showing how hard it is to stop. Example: The fast sled had more __ down the hill.

mass

How much matter is in an object. Example: The bowling ball has more __ than the tennis ball.

average speed

Total distance divided by total time. Example: Our __ was higher on the smooth sidewalk.

negative number

A number less than zero. Example: The change in speed was a __ when the car slowed.