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SP-STEM5 > WEEK03A > Flashcards

WEEK03A Flashcards

1
Q

two types of matter

A

pure substance and mixture

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2
Q

two types of pure substance

A

element and compound

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3
Q

difference between element and compound

A

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

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4
Q

types of mixture

A

homogeneous and heterogeneous

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5
Q

difference between homogeneous and heterogeneous

A

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.

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6
Q

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

A

homogeneous

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7
Q

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

A

heterogeneous

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8
Q

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

A

mixture

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9
Q

Components of a mixture are not—

A

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

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10
Q
  • prevents the caking of the product and ensures the smooth distribution of makeup to the skin.
  • generally recognized as safe.
A

talc

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11
Q
  • Dangerous and hazardous substances
A

Artificial dyes and Lead

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12
Q
  • provide hydration and gives the smooth feel of the skin.
A

glycerin

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13
Q

All elements and compounds comprise pure substances.

A

true

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14
Q

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

A

mixtures

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15
Q

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

A

dipole

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16
Q

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

A

magnetic domain

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17
Q

what gives magnet its magnetic property

A

electrons

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18
Q

helps arrange domain of metal

A

magnetic field

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19
Q

magnets can lose their magnetism

A

true

20
Q

separation of liquid and solid

A

evaporation

21
Q

what are the physical methods of separating mixture

A

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

22
Q

2 methods that separates liquid and solid by filtering

A

filtration and decantation

23
Q

methods separating by density

A

filtration and decantation

24
Q

easy to evaporate

A

volatile

25
Q

transition from solid to gas

A

sublimation

26
Q

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

A

distillation

27
Q

where does the retained original liquid go in distillation

A

condenser

28
Q

does not have constant properties and composition

A

mixture

29
Q

have constant properties and composition

A

pure substance

30
Q

what is density

A

mass of unit volume

31
Q

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

A

physical properties

32
Q

example of physical properties

A

Density
Hardness
malleability
viscosity
boiling point

33
Q

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

A

chemical properties

34
Q

example of chemical properties

A

Chemical reactivity
Flammability
Ability to oxidize

35
Q

ability to change shape

A

malleability

36
Q

introduces oxygen to alter the substance

A

flammability

37
Q

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

A

intensive property

38
Q

properties that depend on the amount of matter in a sample

A

extensive property

39
Q

examples of intensive property

A

density, temperature, boiling point, concentration, and luster

40
Q

examples of extensive property

A

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

41
Q

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

A

physical change

42
Q

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

A

physical change

43
Q

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

A

chemical change

44
Q

example of physical change

A

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

45
Q

example of chemical change

A

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

SP-STEM5 (7 decks)

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