#1 Fluids and Density

Question 1

What are fluids?

Answer 1

Any form of matter that can flow (no fixed shape)

Question 2

What are examples of fluids?

Answer 2

Liquids and gases

Question 3

What is density?

Answer 3

The amount of mass contained in a certain volume

Question 4

Usually, are liquids more dense or less dense than solids?

Answer 4

Less dense

Question 5

As temperature increases, particles of a substance spread out and density ________.

Answer 5

Decreases

Question 6

Why is water an exception of liquids being less dense than solids?

Answer 6

Water particles spread apart more in solid form and ice flows on liquid water

Question 7

What is the formula for density calculations?

Answer 7

density = mass/volume

Question 8

What are the possible units of density?

Answer 8

g/mL, g/cm³, kg/L

Question 9

How do you find mass?

Answer 9

Use a balance or scale

Question 10

How do you find the volume of a simple shape?

Answer 10

Width × length × height → do the math

Question 11

How do you find the volume of an irregular shape?

Answer 11

Use a method known as displacement.

Put something in water, the volume of water goes up and subtract it from the original volume of water.

Question 12

[Practice Question A] A machine shop worker records the mass of an aluminum cube as 176 g. If one side of the cube measures 4 cm, what is the density of the aluminum?

Answer 12

density = 2.75 g/cm³

Question 13

[Practice Question B] A graduated cylinder containing 50 mL of water has a mass of 70 g. As you put the object in a graduated cylinder, the water rises to 80 mL and the total mass increases to 90 g. What is the density of the object?

Answer 13

density = 0.66 g/mL

Question 14

What is the shape of a solid, liquid and gas?

Answer 14

solid = fixed
liquid = not fixed (takes the shape of the container)
gas = not fixed

Question 15

What is the volume of a solid, liquid and gas?

Answer 15

solid = fixed
liquid = fixed
gas = not fixed

Question 16

How are the particles of a solid, liquid and gas arranged?

Answer 16

solid = little space
liquid = enough room to slide around
gas = lots of room

Question 17

Describe the movement of particles in solids, liquids, and gases.

Answer 17

solid = vibrating
liquid = sliding past one another
gas = can move freely

Question 18

What change of state is gas to liquid? Is heat released or added?

Answer 18

condensation; released

Question 19

What change of state is gas to solid? Is heat released or added?

Answer 19

deposition; released

Question 20

What change of state is liquid to gas? Is heat released or added?

Answer 20

evaporation; added

Question 21

What change of state is solid to liquid? Is heat released or added?

Answer 21

melting; added

Question 22

What change of state is liquid to solid? Is heat released or added?

Answer 22

solidification; released

Question 23

What change of state is solid to gas? Is heat released or added?

Answer 23

sublimation; added