Change of State, Physical Change vs Chemical Change, Composition of Matter, Characteristic Physical Properties

Question 1

A change of state involves…

Answer 1

The addition or removal of heat energy

Question 2

What is Liquefication?

Answer 2

Melting (solid to liquid)

Question 3

What is vaporization?

Answer 3

Liquid to gas

Question 4

What is condensation?

Answer 4

Gas to liquid

Question 5

What is solidification?

Answer 5

Liquid to solid

Question 6

What is sublimation?

Answer 6

Liquid to gas or gas to liquid

Question 7

What is thermal expansion?

Answer 7

When heat is applied, particles move fast, and push away taking up more space

Question 8

What is a physical change?

Answer 8

Alters the form of a substance without changing it into another substance

Question 9

What is chemical change?

Answer 9

The substance is changed into a different substance with different properties

Question 10

What are the 6 signs of chemical change?

Answer 10

1. Colour change
2. Precipitate-the solid that forms from a solution during a chemical reaction
3. Gas production (bubbles)
4. Temperature change
5. Changes in characteristic properties
6. Difficult to reverse

Question 11

Mixtures contain at least ______ different substances that ______ be separated by physical means

Answer 11

two

can

Question 12

If pure substances mix very well with one another so well that you cannot see the parts, what is it called?

Answer 12

A solution

Question 13

The substance that does the dissolving is the…

Answer 13

Solvent

Question 14

The substance that gets dissolved is the…

Answer 14

Solute

Question 15

If pure substances don’t mix well with one another and you can see the different parts, what is it called?

Answer 15

A mechanical mixture

Question 16

When different atoms join together what does it create?

Answer 16

A molecule of a compound

Question 17

What is the equation for density of a substance?

Answer 17

Density= mass/volume

Question 18

What is the equation for mass?

Answer 18

Mass= densityXvolume

Question 19

What is the equation for volume?

Answer 19

Volume= mass/density

Question 20

What is density?

Answer 20

The amount of matter per unit volume

Question 21

What is mass?

Answer 21

Amount of matter (g or kg)

Question 22

What is volume?

Answer 22

The amount of space (cm3, m3, mL, L)

Question 23

What is slope?

Answer 23

Rise/run

Question 24

On a graph, where does the volume go, x-axis or y-axis?

Answer 24

X-axis

Question 25

On a graph, where does mass go, on the x-axis or the y-axis?

Answer 25

Y-axis

Question 26

What happens when evaporation occurs?

Answer 26

Particles have gained enough energy to break away from clump

Question 27

What happens when solidification occurs?

Answer 27

Heat energy is removed, particles move slow, less collisions and decrease in volume

Question 28

What do pure substances contain?

Answer 28

Only one kind of particle [Atom or molecule] it’s components cannot be separated by physical methods

Question 29

What is a “Pure substance that cannot be broken down under ordinary chemical means. The smallest particle in an element is the atom”

Answer 29

Element

Question 30

What are “Pure substances that contain two or more different elements combined.they can only be separated by chemical means”

Answer 30

Compound

Question 31

What is “the smallest part of a compound that still has the properties of the compound”

Answer 31

Molecule

Question 32

What are “Properties unique to only one substance that can be used to identify or classify it”

Answer 32

Characteristical physical properties

Question 33

What is 1 cm³ equal to in volume?

Answer 33

1 mL

Question 34

How do you convert grams to kilograms?

Answer 34

Divided by 1000

Question 35

You convert kilograms to grams?

Answer 35

Multiply by 1000

Question 36

How do you convert 1 g/cm³ to kg/m³ or 1 g/1 mL to kg/L?

Answer 36

Multiply by 1000

Question 37

How do you convert kg/m³ to g/cm³ or kg/L to g/mL?

Answer 37

Divided by 1000