Density: Practice & Review

In a density column, is the substance with the HIGHEST density on the bottom or the top?

• Bottom

• Top

Answer explanation

In a density column, substances arrange themselves based on density. The substance with the highest density sinks to the bottom, while less dense substances float on top. Therefore, the correct answer is 'Bottom'.

In a density column, is the substance with the LOWEST density on the bottom or on the top?

• Bottom

• Top

Answer explanation

In a density column, substances with lower densities float on top of those with higher densities. Therefore, the substance with the lowest density is found at the top.

Which of the following is the correct definition of density?

• The amount of stuff in an object

• The amount of space an object takes up

• A measure of the force of gravity on an object

• The amount of matter (mass) packed into a space (object)

Answer explanation

Density is defined as the amount of matter (mass) packed into a given volume (space) of an object. This makes the correct choice the one that accurately describes this relationship.

If A, B, and C from the picture represent different objects, which one has the HIGHEST density?

• A

• B

• C

Answer explanation

To determine which object has the highest density, we compare their mass and volume. Object C has the highest mass relative to its volume, indicating it has the highest density among A, B, and C.

If A, B, and C from the picture represent different objects, which one has the LOWEST density?

• A

• B

• C

Answer explanation

Object A has the lowest density because it is less compact than B and C, which means it occupies more volume for the same mass. Therefore, A is the correct choice for the object with the lowest density.

Which of the following is an example of an object with a LOW density?

• Pillow

• Bowling Ball

• Brick

Answer explanation

A pillow has a low density because it is made of soft materials like foam or feathers, which trap air and make it lightweight. In contrast, a bowling ball and a brick are much denser due to their solid and heavy materials.

Which of the following is an example of an object with a HIGH density?

• Pillow

• Bowling Ball

• Beach Ball

Answer explanation

A bowling ball has a high density due to its heavy materials, making it much denser than a pillow or beach ball, which are filled with air and lighter materials.

Which of the following is the correct UNITS for density?

• grams (g)

• Newtons (N)

• cm³

• g/cm³

Answer explanation

The correct unit for density is g/cm³, which represents grams per cubic centimeter. This unit indicates mass (grams) per unit volume (cubic centimeters), making it the appropriate choice for measuring density.

What is the density of an object if it has a mass of 6g and a volume of 3 cm³? (Hint: Density = mass/volume)

• 6 g/cm³

• 3 g/cm³

• 2 g/cm³

• 1/3 g/cm³

Answer explanation

To find the density, use the formula: Density = mass/volume. Here, mass = 6g and volume = 3 cm³. Thus, Density = 6g / 3 cm³ = 2 g/cm³. Therefore, the correct answer is 2 g/cm³.

Does 1 cup or 6 cups of water have a HIGHER density?

• 1 cup

• 6 cups

• They have the same density

Answer explanation

Density is defined as mass per unit volume. Since both 1 cup and 6 cups of water are made of the same substance (water) and have the same density, they have the same density regardless of the amount.