Density Practice

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.

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.

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.

Which substance is the MOST DENSE in this picture?

• Vegetable Oil

• Dish Soap

• Honey

• Corn Syrup

Answer explanation

Honey is the most dense substance among the options listed. It has a higher density than vegetable oil, dish soap, and corn syrup, making it the correct choice.

Helium balloons rise on earth because

• helium is less dense than air

• helium is more dense than air

• helium is cooler than air

• helium is warmer than air

Answer explanation

Helium balloons rise because helium is less dense than air. This difference in density creates an upward buoyant force, allowing the balloon to float.

Tags

NGSS.MS-PS2-4

In this image, the VOLUME of A is _____ the volume of B

• equal to

• greater than

• less than

Answer explanation

The volume of A is less than the volume of B, indicating that A occupies a smaller space compared to B. Therefore, the correct choice is 'less than'.

What happens to the density of the balloon if volume is doubled?

• The density is cut in half.

• The density stays the same.

• The density doubles.

• Not enough information to tell.

Answer explanation

Density is defined as mass divided by volume. If the volume of the balloon is doubled while the mass remains the same, the density will decrease, specifically cut in half.

As a substance is COOLED it's DENSITY usually...

• increases

• decreases

• stays the same

Answer explanation

As a substance is cooled, its particles move closer together, leading to an increase in density. Therefore, the correct answer is that density usually increases when a substance is cooled.

Tags

NGSS.MS-PS1-4