Density 🌷

Question 1

What is density?

Answer 1

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

Question 2

What is the formula for calculating density?

Answer 2

Density = Mass / Volume

Question 3

True or False: Density is a measure of how much matter is in a given space.

Answer 3

True

Question 4

What units are commonly used to express density?

Answer 4

Kilograms per cubic meter (kg/m³) or grams per cubic centimeter (g/cm³)

Question 5

Fill in the blank: An object with a density greater than water will ______.

Answer 5

sink

Question 6

If an object has a mass of 200 grams and a volume of 50 cm³, what is its density?

Answer 6

4 g/cm³

Question 7

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

Answer 7

Density decreases as substances expand.

Question 8

True or False: The density of a substance can change depending on its state (solid, liquid, gas).

Answer 8

True

Question 9

Which has a higher density: iron or aluminum?

Answer 9

Iron

Question 10

What is the density of water?

Answer 10

1 g/cm³

Question 11

Fill in the blank: The density of an object can be found by measuring its ______ and ______.

Answer 11

mass; volume

Question 12

What is the relationship between density and buoyancy?

Answer 12

Objects with lower density than the fluid they are in will float.

Question 13

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

Answer 13

True

Question 14

How can you increase the density of a gas?

Answer 14

By decreasing its volume or increasing its mass.

Question 15

What type of material typically has a low density?

Answer 15

Foam or air-filled materials

Question 16

If two objects have the same volume but different masses, how will their densities compare?

Answer 16

The object with the greater mass will have a higher density.

Question 17

What is the principle of displacement in relation to density?

Answer 17

It states that the volume of fluid displaced by an object is equal to the volume of the object submerged.

Question 18

Fill in the blank: A material that is denser than water will ______ when placed in water.

Answer 18

sink

Question 19

What does it mean if an object is said to be ‘neutrally buoyant’?

Answer 19

Its density is equal to the fluid it is in.

Question 20

True or False: A substance’s density can help identify it.

Answer 20

True

Question 21

In general, do solids or liquids have a higher density?

Answer 21

Solids

Question 22

What happens to the density of ice compared to liquid water?

Answer 22

Ice is less dense than liquid water, which is why it floats.

Question 23

If an object has a volume of 100 cm³ and a density of 2 g/cm³, what is its mass?

Answer 23

200 grams

Question 24

Fill in the blank: The denser the material, the ______ it is likely to sink.

Answer 24

more

Question 25

What is the density of air at sea level?

Answer 25

Approximately 1.225 kg/m³