Variables, Density, and Metric conversions

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3 Kinds of Variables

Independent: Something changed by the scientist;What is tested;What is manipulated

Dependent: Something that is affected by the change in the independent variable; What is observed or being measured

Controlled: Not changing

Density

Density: Mass per unit volume. It is a measure of how tightly packed and how heavy the molecules are in an object. Density is the amount of matter within a certain volume

More density, lower it will sink

Lower density, higher it will rise

To Find Density:

Find the mass of the object

Find the volume of the object

Divide; Density= Mass/Volume

Find Volume of Irregular Object

Measure the water in a graduated cylinder

Place object into graduated cylinder

Measure the water again

Subtract the two numbers= Volume

Unit for Density g/cm or g/ml

M=g or kg/DxV

V= ml or cm cubed/M/D

D: g or kg/ ml/cm cubed/M/V