Volume and Density

Volume (Capacity)

• Volume is the amount of space taken up by an object

• Volume can also mean how much something holds

• Volume can be measured in many different units

• Volume can be calculated by using water displacement!

Units for Measuring Volume

Metric Standard• Liter (l)• Milliliter (ml)• Cubic Centimeter (cc or cm3)

Remember: 1 ml = 1 cc

Other Standards• Gallon (gal.)• Quart (qt.)• Pint (pt.)• Cup (c.)• Tablespoon (tbsp.)• Teaspoon (tsp.)• Fluid Ounce (fl. oz.)• Cubic Inches (in3 or cu in.)• Cubic Feet (ft3 or cu. ft.)

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

3. Measure the level after the ball has displaced some of the water. 10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

3. Measure the level after the ball has displaced some of the water. 39 ml 10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

1. Measure the level of the water in a container. 30 ml

2. Insert an object in the water. We’ll use a metal ball.

3. Measure the level after the ball has displaced some of the water. 39 ml

4. Finally, find the difference between the water level before displacement and after displacement.

39 minus 30 = 9 ml

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Using Water Displacement to Calculate Volume

The metal ball has a volume of 9 ml!

10 ml

20 ml

30 ml

40 ml

50 ml

60 ml

70 ml

Density

• Density refers to “how crowded” something is!• When we talk about density, we usually referring

to “how crowded” the molecules are.• Density can be measured in grams per milliliter

( g/ml )• Solids are the densest phase of matter. Gases are

the least dense.

How to Calculate Density

1. Find the volume of the object. You can use water displacement for this. Let’s use the metal ball again. It’s volume was 9 ml!

How to Calculate Density

1. Find the volume of the object. You can use water displacement for this. Let’s use the metal ball again. It’s volume was 9 ml!

2. Now find the mass of the object. You can use a triple bean balance scale for this.

How to Calculate Density

1. Find the volume of the object. You can use water displacement for this. Let’s use the metal ball again. It’s volume was 9 ml!

2. Now find the mass of the object. You can use a triple bean balance scale for this. Mass = 54 g

3. Divide the mass by the volume!

54 g ÷ 9 ml = 6 g/ml

More About Density . . .

• Pure water has a density of 1 g/ml• If any material is denser than the fluid that

surrounds it, it will have negative buoyancy. It will sink!

• If any material is less dense than the fluid that surrounds it, it will have positive buoyancy. It will float!

Which of the following items would have positive buoyancy in water?

• Widget 3 g/ml• Gork 9 g/ml• Joob .5 g/ml• Winky 1.4 g/ml• Noople 1.03 g/ml• Hoosh .099 g/ml

Which of the following items would have positive buoyancy in water?

• Widget 3 g/ml• Gork 9 g/ml• Joob .5 g/ml• Winky 1.4 g/ml• Noople 1.03 g/ml• Hoosh .099 g/ml

Which of the following items would float in a fluid that had a density of 1.45 g/ml ?

• Widget 3 g/ml• Gork 9 g/ml• Joob .5 g/ml• Winky 1.4 g/ml• Noople 1.03 g/ml• Hoosh .099 g/ml