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CC Def Match > Science- Changes in Matter Ch2 > Flashcards

Science- Changes in Matter Ch2 Flashcards

1
Q

physical change

A

change where matter keeps the same chemical properties

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2
Q

chemical change

A

a change where one kind of matter changes into a different kind of matter with different properties

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3
Q

evaporation

A

takes place when particles leave a liquid to become a gas

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4
Q

condensation

A

occurs when a gas turns into a liquid

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5
Q

sublimation

A

process where some solids change directly to gases without first becoming liquids (think dry ice)

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6
Q

reactant

A

a substance used in a reaction in a chemical change

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7
Q

product

A

a substance produced in a reaction in a chemical change

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8
Q

chemical equation

A

shows what happens during a chemical reaction

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9
Q

physical

A

freezing rain (physical or chemical change)

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10
Q

physical

A

sawing wood (physical or chemical change)

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11
Q

physical

A

shredding paper (physical or chemical change)

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12
Q

physical

A

melting wax (physical or chemical change)

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13
Q

physical

A

grating a potato (physical or chemical change)

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14
Q

physical

A

hammer copper into sheets (physical or chemical change)

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15
Q

physical

A

salt crystals dissolved in water (physical or chemical change)

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16
Q

chemical

A

often produces a gas or a solid (physical or chemical change)

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17
Q

chemical

A

burning (physical or chemical change)

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18
Q

chemical

A

copper crystals in tree experiment (physical or chemical change)

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19
Q

chemical

A

burning wax (physical or chemical change)

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20
Q

solid, liquid, gas

A

3 states of matter

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21
Q

solid

A

have their own shape and volume that does not change (Pick one of the 3 states of matter)

22
Q

physical property

A

state of a material as a solid, liquid, or gas at room temperature (physical or chemical property)

23
Q

solid

A

melts into a liquid as it warms up (Pick one of the 3 states of matter)

24
Q

liquid

A

does not have its own shape and volume does not change (Pick one of the 3 states of matter)

25
Q

gas

A

state where particles are far apart (Pick one of the 3 states of matter)

26
Q

liquid, solid

A

state where particles are close together (Pick two of the 3 states of matter)

27
Q

gas

A

does not have its own shape and volume changes (Pick one of the 3 states of matter)

28
Q

freezing point, melting point

A

temperature at which a material changes between solid and liquid states

29
Q

moving

A

warmer particles are always…

30
Q

expand

A

warm particles tend to (shrink or expand)

31
Q

shrink

A

cooling materials tend to (shrink or expand)

32
Q

Law of Conservation of Mass

A

matter cannot be created or destroyed during a chemical reaction

33
Q

decomposition reaction

A

type of reaction where compounds split apart to form smaller compounds or elements

34
Q

combination reaction

A

type of reaction where elements or compounds come together to form new compounds

35
Q

replacement reaction

A

type of reaction where two or more compounds split apart

36
Q

chemical

A

chemicalrust forming on a chain (physical or chemical)

37
Q

decomposition

A

hydrogen peroxide reaction (decomposition, combination, replacement)

38
Q

combination

A

rust forming on a chain (decomposition, combination, replacement)

39
Q

replacement

A

two colorless liquids mixed and new substance formed is a yellow substance in water (decomposition, combination, replacement)

40
Q

chemical

A

_____ properties can be used to separate some mixtures. (Choose chemical or gas)

41
Q

solution

A

A ____ is a uniform mixture of two substances.

42
Q

true

A

Heat and carbon can be used to release iron from ore (true or false)

43
Q

true

A

Chemical properties can be used to remove lead from a solution of lead and other materials. (true or false)

44
Q

false

A

weak acids and bases react more easily with materials than do strong acids and bases. (true or false)

45
Q

true

A

lemon juice and vinegar are acids. (true or false)

46
Q

true

A

in flame tests, different substances cause a flame to have different colors. (true or false)

47
Q

false - (base turns purple, acid turns red, orange)

A

Strong acids will turn universal indicator paper purple. (true or false)

48
Q

chemical equation –> replacement

A

2FeO + C –> 2Fe + CO2 (decomposition, combination or replacement)

49
Q

gas

A

particles far apart (Pick 1, 2 or 3 of the 3 states of matter)

50
Q

liquid, solid

A

particles close together (Pick 1, 2 or 3 of the 3 states of matter)

51
Q

gas, liquid

A

no distinct shape (Pick 1, 2 or 3 of the 3 states of matter)

CC Def Match (8 decks)

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