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Matter > Chapter 1 > Flashcards

Chapter 1 Flashcards

1
Q

What does WHMIS stand for?

A

Workplace Hazardous Materials Information System

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2
Q

What does WHMIS do?

A

Requires hazardous materials to be properly labelled and for the label to include a warning and symbol

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3
Q

When were the WHMIS symbols created

A

Symbols were first created in 1988 and later updated in 2015

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4
Q

What is WHMIS

A

The Canadian governments system for identifying hazards

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5
Q

What is the difference between the 1988 symbols and the 2015?

A

The 1988 symbols can be recognized by their black circle border and the 2015 by their red diamond border

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6
Q

What is the GHS

A

Global Harmonized System, an international agreement to use the same hazard pictograms in different countries

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7
Q

Why was WHMIS revised?

A

WHMIS was revised to be compatible with the GHS

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8
Q

What is an MSDS(or SDS)?

A

(Material) Safety Data Sheets

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9
Q

What are MSDS used for?

A

Used to provide material’s Name & Formula, Physical Properties, Stability & Reactivity, Potential Health Effects, Handling & Storage, and Disposal.

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10
Q

What is an independent variable?

A

Quantities that can be decided in advance

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11
Q

What is a dependant variable

A

Variables that cannot be specified in advance and depend on Independent Variables

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12
Q

what is a hypothesis

A

A prediction about how changes in one of the independent variables will affect one of the dependent variables.

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13
Q

what is a manipulated variable

A

The independent variable in the hypothesis. What changes in the experiment.

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14
Q

what is the responding variable?

A

The dependent variable in the hypothesis. What is resulting from the manipulated.

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15
Q

what is a controlled variable

A

Independent variables that are not manipulated.

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16
Q

Explain the difference between a element and compound

A

Elements contain only one type of atom (e.g. iron) while compounds consist of molecules or crystals made from two or more different types of atoms (e.g. NaCl or H2O)

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17
Q

Explain the difference between a pure substance and mixture

A

A pure substance contains only one kind of material (either an element or a compound) while a mixture contains two or more pure substances (e.g. NaCl dissolved in water).

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18
Q

Explain the difference between a homogeneous and heterogeneous mixture

A

A homogeneous mixture (solution) is mixed uniformly (the properties are the same everywhere) while a heterogeneous mixture is non-uniform (there are regions with different properties).

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18
Q

Explain the difference between a homogeneous and heterogeneous mixture

A

A homogeneous mixture (solution) is mixed uniformly (the properties are the same everywhere) while a heterogeneous mixture is non-uniform (there are regions with different properties).

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19
Q

What are the different components of a solution called?

A

Solvent: Substance that dissolves the solute

Solute: Substance that is dissolved in the solvent

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20
Q

The components of a mixture can be separated using different methods. Describe Distillation.

A

Heat the mixture until one of the substances boils and evaporates

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21
Q

The components of a mixture can be separated using different methods. Describe paper chromatography

A

Different substances will move up the paper at different rates

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22
Q

The components of a mixture can be separated using different methods. Describe Filtration

A

Separate solids from liquids or two solids of different particle sizes using a filter

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23
Q

Pure substance or mixture? Air

A

mixture

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24
Q

Pure substance or mixture? Oxygen

A

Pure Substance

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25
Q

Pure substance or mixture? Distilled water

A

Pure substances

26
Q

Pure substance or mixture? Tap water

A

Mixture

27
Q

Pure substance or mixture? Rootbeer

A

Mixture

28
Q

Pure substance or mixture? Gasoline

A

Mixture

29
Q

Pure substance or mixture? Table Salt

A

Pure substances

30
Q

Pure substance, Homogeneous mixture or heterogeneous mixture? Candle wax

A

Heterogeneous

31
Q

Pure substance, homogeneous mixture or heterogeneous mixture? Egg

A

Heterogeneous

32
Q

Pure substance, homogeneous mixture or heterogeneous mixture? Ice cube floating in water

A

Pure substances

33
Q

Pure substance, homogeneous mixture or heterogeneous mixture? Silver Nitrate solution

A

Homogeneous

34
Q

Physical or chemical change? Rusting of iron

A

Chemical

35
Q

Physical or chemical change? Burning coal

A

Chemical

36
Q

Physical or chemical change? Condensing water vapour

A

Physical

37
Q

Physical or chemical change? Food spoilage

A

Chemical

38
Q

Physical or chemical change? Bending copper wire into a coil

A

Physical

39
Q

Physical or chemical change? Shattering an ice cube

A

Physical

40
Q

Physical or chemical change? Roasting a turkey

A

Chemical

41
Q

Physical or chemical change? Frost forming on a windowpane

A

Physical

42
Q

Chemical or physical property? Bromine boils at 59°C

A

Physical

43
Q

Chemical or physical property? Sulfuric acid is a strong acid

A

chemical

44
Q

Chemical or physical property? wood can be burned

A

chemical

45
Q

Chemical or physical property? wood can be split

A

physical

46
Q

Chemical or physical property? water is densest at 4°C

A

physical

47
Q

Chemical or physical property? Helium doesn’t react with anything

A

Chemical

48
Q

Write a procedure that could be used to separate a mixture of sand and sugar.

A
  1. Add warm water to the mixture to dissolve the sugar.
  2. Use a filter to remove the sand.
  3. Use distillation to remove the water, leaving sugar behind.
49
Q

Can an atom be divided?

A

No

50
Q

Who proposed that atoms can’t be divided?

A

Democritus

51
Q

Who proposed the Billiard Ball Model?

A

John Dalton

52
Q

What model did John Dalton propose?

A

Billiard Ball Model

53
Q

What is the smallest particle of all matter?

A

Atom

54
Q

Are atoms of different elements the same size?

A

No

55
Q

What is Dalton’s model?

A

An atom is a featureless sphere that has no internal parts

56
Q

Does the billiard ball explain the electrical properties of matter?

A

no

57
Q

Does matter have positive and negative parts?

A

yes

58
Q

What experiments did J.J. Thomson conduct in 1897

A

J.J. Thomson performed experiments to see how positive and negative matter were affected by electric and magnetic forces.

59
Q

What were the results of Thomson experiments?

A
  • The negative parts of matter have much smaller mass than the positive parts
  • The mass of the positive parts depends on the element (same as Dalton’s model)
  • The mass of the negative parts will always be the same, regardless of which element the negative part came from
  • These negative parts, common to all elements, are called electrons
60
Q

What model did JJ Thomson propose?

A

Raisin bun/Plum pudding

61
Q

What is the raisin bun model

A

There are electrons (“raisins”) embedded in the positive atom (“bun”) that have a very small mass and a negative charge

62
Q

What experiments did Ernest Rutherford conduct in 1909

A

Ernest Rutherford and his students performed an experiment where they fired small, high-speed, positive particles at a thin gold foil

63
Q

What were the results of Rutherford’s expirements

A
  • Most of these “alpha” particles passed through the gold foil with nearly no effect
  • A very small percentage of the alpha particles were deflected by the gold foil to very large angles-
  • Rutherford concluded that the Raisin Bun model could not explain these results

Matter (1 decks)

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