The video tutorial explains how to calculate density using the formula: mass divided by volume. It describes density as a measure of how much mass is contained in a given volume and provides examples to illustrate the concept. The tutorial emphasizes that density remains constant regardless of the size of the object. It includes practice problems to help viewers apply the concept and determine the density of various objects, such as a green cube, a metal cylinder, and a blue sphere.

What two measurements are needed to calculate density?

• Mass and volume

• Volume and temperature

• Mass and weight

• Weight and height

What is the formula for density?

• Mass divided by volume

• Volume minus mass

• Volume divided by mass

• Mass multiplied by volume

In which units can density be expressed?

• Grams per liter and kilograms per cubic meter

• Kilograms per liter and grams per milliliter

• Grams per milliliter and grams per cubic centimeter

• Milliliters per gram and cubic centimeters per gram

If an object has a mass of 127.7 grams and a volume of 16.8 milliliters, what is its density?

• 7.2 grams per milliliter

• 8.0 grams per milliliter

• 7.8 grams per milliliter

• 7.6 grams per milliliter

Why is density an effective way to identify unknown substances?

• Because density remains constant regardless of the size of the substance

• Because density changes with the size of the substance

• Because density is easy to measure

• Because density is the same for all substances

If an object with a density of 2 grams per milliliter is broken into 10 pieces, what will be the density of each piece?

• 10 grams per milliliter

• 1 gram per milliliter

• 2 grams per milliliter

• 0.2 grams per milliliter

What is the volume of the green cube if the initial water level is 40 ml and it rises to 48 ml when the cube is placed in the water?

• 8 ml

• 48 ml

• 88 ml

• 40 ml

What is the density of the green cube if its mass is 8 grams and its volume is 8 milliliters?

• 1.2 grams per milliliter

• 0.8 grams per milliliter

• 0.1 grams per milliliter

• 1.0 grams per milliliter

What is the density of the metal cylinder if its mass is 8.3 grams and its volume is 1 milliliter?

• 8.3 grams per milliliter

• 0.83 grams per milliliter

• 83 grams per milliliter

• 0.083 grams per milliliter

What is the density of the blue sphere if its mass is 2.6 grams and its volume is 1 milliliter?

• 2.6 grams per milliliter

• 0.26 grams per milliliter

• 26 grams per milliliter

• 0.026 grams per milliliter