Mix and Flow of Matter Complete Unit

Question 1

What is a fluid?

Answer 1

Usually liquid or gas; is anything that has no fixed shape. Resists deformation and can flow. They also take the form of their containers.

Question 2

What is a slurry?

Answer 2

A mixture of a liquid (usually water) and a solid.

Question 3

What are the four useful properties of fluids?

Answer 3

1) Viscosity- a measure of the resistance of a fluid to flow.
2) Compressability- a force acts on a fluid, that fluid is under compression.
3) Buoyancy- the upward force on an object against the force of gravity produced by the surrounding fluid.
4) Density- the amount of matter in a given volume

Question 4

What is matter?

Answer 4

Anything that has a mass and occupies space.

Question 5

What is a pure substance?

Answer 5

Contains only one type of particle, and can exist in three states of matter (solid, liquid, gas). Ex. Iron, gold, oxygen

Question 6

What is a mixture?

Answer 6

Contains two or more pure substances. A result of tiny particles of different substances filling the spaces between the particles of the larger substance.
Ex. Blood, vinegar, soil

Question 7

What is a heterogeneous mixture?

Answer 7

A mixture where the compound is not uniform. (not completely mixed good)
Ex. Chocolate chip cookies

Question 8

What is a homogeneous mixture?

Answer 8

A mixture where the compound is uniform (completely mixed)

Ex. Blood

Question 9

What is a mechanical mixture?

Answer 9

Can see individual particles.

Ex. Orange juice with pulp

Question 10

What is a Suspension mixture?

Answer 10

Cloudy mixture with tiny particles that can separate. Ex. muddy water.

Question 11

What is a Colloid mixture?

Answer 11

Cloudy mixture with tiny particles that do not separate. Ex. Milk

Question 12

What are solutions?

Answer 12

Made up of more than one substance but appears as if it is one. Are created when particles of the solute are attracted to the particles of the solvent in a process called dissolving. Ex. Kool-Aid

Question 13

What is Solute?

Answer 13

Substances that dissolves in a solvent to form a solution. Ex. Salt

Question 14

What is Solvent?

Answer 14

Substance that dissolves a solute to form a solution. Ex. Water

Question 15

What is Concentration?

Answer 15

The amount of solute dissolved in a specific amount of solvent. The more solute dissolved, the more concentrated the solution. The more solvent, the more diluted the solution.

Question 16

What is solubility?

Answer 16

The ability to dissolve.

Question 17

What is an unsaturated solution?

Answer 17

Solution in which more solute can be dissolved to the given solvent amount, temperature, etc.

Question 18

What is a saturated solution?

Answer 18

Solution in which no more solute can be dissolved at a given solvent amount, temperature, etc.

Question 19

What is a saturation point?

Answer 19

A point at which no more solute can be dissolved in a given volume of solvent at a given temperature.

Question 20

What four things affect the solubility and rate of dissolving?

Answer 20

1) Type of Solute and Solvent
2) Temperature (temperature of liquid solvent decreases = solubility of the gas decreases)
3) Particle size (smaller the particle size, the faster it dissolves.)
4) Agitation (the rate of dissolving increases with increased stirring or agitation)

Question 21

What is the Particle Model of Matter?

Answer 21

1) All matter is made up of tiny particles
2) These particles are always moving
3) These particles are attracted or bonded to each other
4) Particles have spaces between them

Question 22

What is viscosity?

Answer 22

Liquid’s internal resistance or friction that keeps it from flowing.

Question 23

What does high and low viscosity mean?

Answer 23

High viscosity- slow flowing

low viscosity- fast flowing

Question 24

What does temperature change do to particles?

Answer 24

• As temperature increases, the particles of matter move more quickly, lowering viscosity
• As temperature decreases, the particles of matter begin to move slowly, raising the viscosity

Question 25

What is Density?

Answer 25

The amount of mass in a given volume.

Question 26

How is density calculated?

Answer 26

d= m/v 
density= mass/volume

Question 27

What is compressibility?

Answer 27

The amount of a substance that can be compressed and temporarily deformed.

Question 28

What is pressure?

Answer 28

The amount of force applied to a given area. Measured in Pascals (Pa)

Question 29

How do you calculate pressure?

Answer 29

p= f/a 
pressure= force/area

Question 30

How does dept affect pressure?

Answer 30

The deeper a diver goes, the more pressure there is.

Question 31

What is Pascal’s law?

Answer 31

Pressure within a closed system is exerted equally in all directions.

Question 32

What are surfactants?

Answer 32

Particles that attach themselves to dirt and oil particles.

Question 33

How does a detergent work?

Answer 33

1) There is dirt and grease on fabric.
2) Water, detergent, and clothes are agitated in the washing machine and the dirt breaks off.
3) Surfactants in the detergent surround the dirt particles so they can’t re-attach to clothes