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weight

the measure of the pull of gravity on an object

mass

the amount of matter in an object. Tools including balance scales are used to measure this.

volume

the amount of space that matter take up.

volume of liquid

measured directly with a beaker or graduated cylinders

liters and milliliters

metric units of volume

formula for volume of an area

LxWxH (length times width times height)

metric system

a system of measurement based on multiples of 10

density

describes how much matter is in a given space or volume

density of a substance

measurement used to determine whether or not something will float