Density

Question 1

What is the formula for density?

Answer 1

Density = Mass / Volume

Question 2

True or False: Density is a measure of how much mass is contained in a given volume.

Answer 2

True

Question 3

If an object has a mass of 10 kg and occupies a volume of 2 m³, what is its density?

Answer 3

5 kg/m³

Question 4

Fill in the blank: The unit of density in the metric system is typically expressed in _____ per cubic meter.

Answer 4

kilograms

Question 5

What happens to the density of an object if its mass increases while its volume remains constant?

Answer 5

The density increases.

Question 6

Which of the following has the highest density: water, air, or iron?

Answer 6

Iron

Question 7

True or False: An object will float in water if its density is less than that of water.

Answer 7

True

Question 8

What is the density of water at 4 degrees Celsius?

Answer 8

1,000 kg/m³

Question 9

Fill in the blank: The density of a substance can change with _____ and _____ conditions.

Answer 9

temperature, pressure

Question 10

What is the relationship between density and buoyancy?

Answer 10

An object will float if it is less dense than the fluid it is in.

Question 11

If a 5 kg object has a density of 500 kg/m³, what is its volume?

Answer 11

0.01 m³

Question 12

True or False: Gases generally have higher densities than liquids.

Answer 12

False

Question 13

What is the term for materials that have a density less than that of water?

Answer 13

Buoyant materials

Question 14

If an object is submerged in water and displaces 3 liters of water, what is its volume in cubic meters?

Answer 14

0.003 m³

Question 15

Multiple choice: Which of the following is a common unit for measuring density? A) kg/m² B) kg/m³ C) m³/kg

Answer 15

B) kg/m³

Question 16

What is the density of air at sea level?

Answer 16

Approximately 1.225 kg/m³

Question 17

Fill in the blank: The principle of _____ states that an object immersed in a fluid experiences a buoyant force equal to the weight of the fluid it displaces.

Answer 17

Archimedes

Question 18

How does temperature generally affect the density of gases?

Answer 18

As temperature increases, density decreases.

Question 19

True or False: Density can be used to identify substances.

Answer 19

True

Question 20

What happens to the density of most substances as they are heated?

Answer 20

Density decreases.

Question 21

If an object has a density of 2,500 kg/m³, is it likely to sink or float in water?

Answer 21

Sink

Question 22

What is the formula to calculate the volume of an object if its mass and density are known?

Answer 22

Volume = Mass / Density

Question 23

True or False: The density of a substance is always constant regardless of its form.

Answer 23

False

Question 24

What is the density of gold?

Answer 24

Approximately 19,320 kg/m³

Question 25

Fill in the blank: The density of a solid is generally _____ than that of a liquid.

Answer 25

greater

Question 26

What is the significance of density in real-world applications?

Answer 26

It helps in material selection, buoyancy calculations, and understanding fluid behavior.

Question 27

Multiple choice: Which of the following would be the least dense? A) Mercury B) Water C) Wood

Answer 27

C) Wood

Question 28

If two objects have the same volume but different masses, what can be said about their densities?

Answer 28

The object with more mass has a higher density.

Question 29

What is a common method to measure the density of a liquid?

Answer 29

Using a hydrometer.

Question 30

True or False: Density is an intensive property of matter.

Answer 30

True

Question 31

What type of materials have very low densities and are often used in packaging?

Answer 31

Foams or aerogels