This document defines key properties of matter - mass, volume, density - and how to measure them. It explains that matter is anything that has mass and takes up space, and defines mass vs weight. Volume is measured as length x width x height or via water displacement. Density is the ratio of an object's mass to its volume, showing how tightly packed its particles are. The document provides examples of calculating volume, density, and identifying unknown materials based on their measured density.

1. Properties of Matter
Ch 2

2. What is Matter?
 Matter is anything that:
◦ Has mass
◦ Takes up space (volume)
◦ Made up of tiny particles called atoms
 Mass:
◦ A measure of the amount of matter in an
object
◦ An object’s mass doesn’t really change
◦ This is different than an object’s weight
 Weight:
◦ A measure of the pull of gravity on an object
◦ Weight can change depending on where you
are in the universe!

3. Measuring Matter
 Volume:
◦ A measure of the amount of space an
object takes up (how many particles are in
it)
◦ How do we calculate volume?
 Volume = Length x Width x Height
 V = L x W x H
 For example:
15
cm
5 cm
20
cm
What is the volume
of this cube in
inches?

4. Another way to find volume
 Volume can sometimes be measured
using water displacement
◦ Water displacement method = putting an
object in a container of water and
measuring how much the water rises
 The amount of water displaced will be equal to
the object’s volume
 This can only be done with solid objects!

5. Practice
 A rock is dropped into a container of
water. Before the rock was added, the
container had 15 mL of water. Now,
the measurement reads 32 mL of
water.
◦ What is the volume of the rock?
 Find the volume of the following
objects: 5 cm
5 cm
5 cm
4 in
2 in
10
cm

6. Density
 Density:
◦ A measure of how tightly packed the
particles are in an object
◦ It is the ratio of the mass to its volume
 Formula: D=m/V (mass / volume)
 For example
 D= 400 g / 25 cm3
 D= 16g/cm3

7. Density Practice
 What is the density of a box that has a mass
of 25 g and a volume of 30 cm3?
 A piece of wood measures 3 cm by 6 cm by 4
cm and has a mass of 80 g. What is its
density?
 A cup of gold colored beads has a mass of
425 g. The volume of the beads is 48 cm3.
Given the following densities, what are the
beads really made of?
◦ 19.3 g/cm3= gold
◦ 8.86 g/cm3= copper
◦ 9.87 g/cm3= bronze