WEEK03A

Question 1

two types of matter

Answer 1

pure substance and mixture

Question 2

two types of pure substance

Answer 2

element and compound

Question 3

difference between element and compound

Answer 3

element is the simplest form of matter so it cannot be broken down. while compound consists of 2 or more elements

Question 4

types of mixture

Answer 4

homogeneous and heterogeneous

Question 5

difference between homogeneous and heterogeneous

Answer 5

homo is uniform all throughout, while hetero lacks

homo’s are evenly distributed, diff. to distinguish components of the mixture, while in hetero are easily identifiable and it has at least two phases that remain separate from each other.

Question 6

the components of the mixture are evenly distributed, and it is difficult to distinguish the components of the mixture

Answer 6

homogeneous

Question 7

the components are easily identifiable and it has at least two phases that remain separate from each other.

Answer 7

heterogeneous

Question 8

Combinations of two or more substances in which the substances retain their distinct identities

Answer 8

mixture

Question 9

Components of a mixture are not—

Answer 9

not chemically combined and can be separated from one another by physical means.

Question 10

• prevents the caking of the product and ensures the smooth distribution of makeup to the skin.
• generally recognized as safe.

Answer 10

talc

Question 11

• Dangerous and hazardous substances

Answer 11

Artificial dyes and Lead

Question 12

• provide hydration and gives the smooth feel of the skin.

Answer 12

glycerin

Question 13

All elements and compounds comprise pure substances.

Answer 13

true

Question 14

made up of two or more substances that are physically combined.

Answer 14

mixtures

Question 15

a molecule in which a concentration of positive electric charge is separated from a concentration of negative charge.

Answer 15

dipole

Question 16

magnets are dipole, cannot separate north and south pole because of

Answer 16

magnetic domain

Question 17

what gives magnet its magnetic property

Answer 17

electrons

Question 18

helps arrange domain of metal

Answer 18

magnetic field

Question 19

magnets can lose their magnetism

Answer 19

true

Question 20

separation of liquid and solid

Answer 20

evaporation

Question 21

what are the physical methods of separating mixture

Answer 21

magnets, evaporation, filtration, decantation, sublimation, and distillation

Question 22

2 methods that separates liquid and solid by filtering

Answer 22

filtration and decantation

Question 23

methods separating by density

Answer 23

filtration and decantation

Question 24

easy to evaporate

Answer 24

volatile

Question 25

transition from solid to gas

Answer 25

sublimation

Question 26

separates original liquid into original form, droplets collected in another container

Answer 26

distillation

Question 27

where does the retained original liquid go in distillation

Answer 27

condenser

Question 28

does not have constant properties and composition

Answer 28

mixture

Question 29

have constant properties and composition

Answer 29

pure substance

Question 30

what is density

Answer 30

mass of unit volume

Question 31

properties of matter can be observed or measured without changing the composition of the substance.

Answer 31

physical properties

Question 32

example of physical properties

Answer 32

Density Hardness malleability viscosity boiling point

Question 33

properties or characteristics of a substance that can only be observed when the substance undergoes a chemical change.

Answer 33

chemical properties

Question 34

example of chemical properties

Answer 34

Chemical reactivity Flammability Ability to oxidize

Question 35

ability to change shape

Answer 35

malleability

Question 36

introduces oxygen to alter the substance

Answer 36

flammability

Question 37

properties that do not depend on the amount of matter in a sample, stays constant even if u have more or less of the substance

Answer 37

intensive property

Question 38

properties that depend on the amount of matter in a sample

Answer 38

extensive property

Question 39

examples of intensive property

Answer 39

density, temperature, boiling point, concentration, and luster

Question 40

examples of extensive property

Answer 40

weight, length, volume, entropy (disorderliness, bigbang), total energy

Question 41

any change that does not lead to the formation of new substances, no product formed

Answer 41

physical change

Question 42

involve only a change in the physical properties of and not its composition.

Answer 42

physical change

Question 43

occur when a substance reacts and produces one or more new substances.

Answer 43

chemical change

Question 44

example of physical change

Answer 44

melting ice, boiling water, breaking glass, chopping wood, folding paper, breaking egg

Question 45

example of chemical change

Answer 45

iron rusting, burning, cooking an egg, baking a cake, electroplating, banana rotting, vinegar+baking soda, fireworks