Properties of Matter Mass Volume Density

Mass Mass is the amount of matter in an object. It is measured with a Triple Beam Balance The unit of measurement for mass is the gram (g) Weight is the pull of gravity on an object. It is not the same as mass. Weight is measured in Newtons (N)

Volume Amount of space an object takes up. It is measured in milliliters (ml) or in cubic centimeters (cm3) 1 ml = 1cm3 Volume can be measured with a ruler or a graduated cylinder.

There are three ways to measure volume: Volume of liquids: Place in a graduated cylinder and read the meniscus. The unit is ml.

Volume of regularly shaped objects Measure length, width and height with a ruler. Insert the values into formula Volume= length x width x height The unit is cm3

Volume of Irregularly Shaped Objects Displacement Method Put water in graduated cylinder. Place object inside. Record the new volume. Subtract

Density Amount of matter in a given amount of space. Density is a property that can be used to identify substances. Each substance has a unique density. For example water has a density of 1 g/ml. Density= Mass/Volume Unit g/ml or g/cm3

More about Density Water has a density of 1.0 g/ml. Substances that float in water have a density less than 1.0 g/ml. Substances that sink in water have density greater than 1.0 g/ml. As long as a substance does not change in phase, a change in shape or size does not affect its density. As a substance changes from solid to liquid to gas the density decreases. The exception to this rule is water. (ice is less dense than water)

Density The substance at the bottom has the most density. top has the least.

Density of different substances