physical/chemical properties (density questions included)

Question 1

What is the definition of density?

Answer 1

Density is the mass of an object divided by its volume.

Question 2

True or False: Density is a physical property of matter.

Answer 2

True

Question 3

Fill in the blank: The formula for calculating density is _____ = mass/volume.

Answer 3

density

Question 4

What is the unit of density in the SI system?

Answer 4

Kilograms per cubic meter (kg/m³)

Question 5

Which of the following substances has the highest density: lead, aluminum, or water?

Answer 5

Lead

Question 6

What happens to the density of most substances as temperature increases?

Answer 6

It decreases.

Question 7

True or False: Chemical properties can be observed without changing the substance.

Answer 7

False

Question 8

What is a common method to determine the density of an irregularly shaped object?

Answer 8

Water displacement method.

Question 9

Fill in the blank: The density of water is _____ g/cm³ at 4°C.

Answer 9

1.0

Question 10

What is the density of air approximately at sea level?

Answer 10

1.225 kg/m³

Question 11

Which property is used to describe how a substance reacts with other substances?

Answer 11

Chemical property

Question 12

What is the relationship between mass and volume in a substance with constant density?

Answer 12

They are directly proportional.

Question 13

True or False: The density of a gas is generally higher than that of a liquid.

Answer 13

False

Question 14

What type of property is boiling point considered?

Answer 14

Physical property

Question 15

Name one factor that can affect the density of a gas.

Answer 15

Temperature or pressure.

Question 16

Fill in the blank: The density of a substance can change if its _____ changes.

Answer 16

temperature or pressure

Question 17

What is the main difference between physical and chemical properties?

Answer 17

Physical properties can be observed without changing the substance, while chemical properties involve a change in the substance.

Question 18

Which of the following is a physical change: melting ice, burning wood, or rusting iron?

Answer 18

Melting ice

Question 19

True or False: The density of a solid is generally greater than the density of a liquid.

Answer 19

True

Question 20

What does it mean if an object is buoyant?

Answer 20

It means the object can float in a fluid due to its density being less than that of the fluid.

Question 21

What is the density of gold?

Answer 21

Approximately 19.32 g/cm³

Question 22

Fill in the blank: The density of a substance can be calculated by dividing its _____ by its _____

Answer 22

mass; volume

Question 23

What is one application of knowing the density of a substance?

Answer 23

To determine if it will float or sink in a fluid.

Question 24

True or False: All substances expand when heated.

Answer 24

True

Question 25

What is the term for a change that does not alter the chemical composition of a substance?

Answer 25

Physical change

Question 26

What is the density of mercury?

Answer 26

Approximately 13.6 g/cm³