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Science 8 > Unit A Mix and Flow of Matter > Flashcards

Unit A Mix and Flow of Matter Flashcards

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1
Q

Fluid

A

anything that has no fixed shape and can flow

ex: liquids and gases

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2
Q

Label any ______

A

containers you put chemicals in

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3
Q

report all ____

A

incidents or spills to a teacher

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4
Q

When using chemicals with _______

A

WHIMIS symbols make sure you understand what the mean.

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5
Q

Properties of Fluids

A
  1. Viscosity
    2.buoyancy
    3.density
  2. compressability
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6
Q

________ are relitivly easy to move

A

fluids

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7
Q

some solids start out as a ______

A

fluids

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8
Q

Identify all 10 WHIMIS symbols of 2015

A
  1. Gas Cylinder 2. Flame 3. Flame over circle

4.Exclamation mark 5. health Hazard 6. Biohazoudous

  1. Corrosion 8.Exploding Bomb 9. Skull and crossbones
  2. Enviornment
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9
Q

Scientific medod steps

A
  1. make an observation
    2.Form a question with research
    3.form a hypothesis
  2. Conduct an experiment
  3. Analize data
  4. draw an conclusion
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10
Q

what do these dangour level of whimiss classifications mean

1.Triangle
2. Hexagon
3. Diamond
4.Circle

A
  1. Caution
    2.Warning
  2. danger
    4.Biohazourdous
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11
Q

WHMIS

A

workplace hazourdous material information system

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12
Q

Read all written ______

A

instructions before doing an activity

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13
Q

Listen carefully to all ____

A

instructions and follow them

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14
Q

wash your _______

A

hands before an experiment, after an experiment, and after handling chemicals

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15
Q

A risk of the gas cylinder

A

gas under pressure

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16
Q

A risk of the Flame

A

flammable products

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17
Q

A risk of the flame over circle

A

oxidizer

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18
Q

A risk of the Exclamation Mark

A

poisonous material

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19
Q

A risk of health Hazard

A

materials with dangour to health

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20
Q

A risk of the biohazordous

A

Infectous material

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21
Q

A risk of the corrosion

A

Material which reacts with metal/ skin

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22
Q

A risk of the exploding bomb

A

Explosive device

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23
Q

A risk of the skull and crossbone

A

acute toxicity

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24
Q

A risk of the enviornment

A

aquatic toxity

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25
Q

Wear safty equitment such as ________

A

googles, glooves, aprons, etc

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26
Q

Think before you _______

A

touch substances may be hot and dangourous

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27
Q

Smell a substance by ______

A

wafting smell with hand to nose.

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28
Q

Do not _______ anything

A

taste

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29
Q

Tie back _______ and roll up _______

A

hair

sleeves

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30
Q

When puring a substance _______

A

into a container put the contaner on a rack not in your hands

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31
Q

Clean up any _______

A

spilled substances imedditly and safely

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32
Q

Never look into a test tube from the _______

A

top, look from the side

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33
Q

Never use ______

A

cracked or broken glassware follow teachers instructions to deal with broken glass

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34
Q

How do you change the concentration of a substance?

A

add more solute to incerease add more solvent to decrease

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35
Q

Unsaturated Solution

A

solute can continue to be added and dissolved

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36
Q

saturated Solution

A

a salution in which no mire solute can be dissolved into solvent

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37
Q

solubility

A

maximum amount of solute that can be dissolved at given temp

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38
Q

True or false

Every Solution has the same saturation point for each tempature

A

false

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39
Q

Insoluble

A

solute will not dissolve

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40
Q

How do you calculate solubility?

A

the mass of the solute will be divided by the mass of the solvent then multiplyed by 100 you right it as your awnser g/the amount of solvent ml

ex: 1600g/100ml 1600 divided by 100 = 16 multiplyed by 100 = 160

then you write it as 160g/100ml

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41
Q

Solubility Curves

A

a graph which shows how much solute can be dissolved into a solvent at a specific tempature

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42
Q

solubility increases with ____ (most of the time)

A

tempature

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43
Q

Solubility is _____ for each substance

A

unique

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44
Q

An example universal solvent is

A

water

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45
Q

Solubilty depends on

A

type of solute, type of solvent, and tempature

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46
Q

Particle model of matter

A

particles are to small to be scene by the naked eye
particles have attraction to one another
particles are always moving and vibrating
particles have spaces in between

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47
Q

why do particles dissolve?

A

particles in solute are attracted to particles in solvent

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48
Q

How does tempature increase the rate of dissolving?

A

increase of temp. makes particles move faster causing more collisionm

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49
Q

How does the size of particles increase the rate of dissolving?

A

smaller pieces of the solute will dissolve faster because more surface area

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50
Q

How does stirring (agitation) increase the rate of dissolving?

A

it moves the particles around and increases collision

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51
Q

Matter

A

anything in our universe that takes up space and has mass

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52
Q

the three states of matter are ____

A

solid, liquid, gas

53
Q

matter can be classified as _____

A

pure substances and mixtures

54
Q

Pure substances are made up by _____

A

1 kind of matter

55
Q

Pure substances have unigue set of -______

A

charecteristics

56
Q

True or false

You can seperate pure substances into different substances

A

false

57
Q

mixtures are made up by _____

A

2 or more kinds of matter/substance

58
Q

each substance in a mixture _______ it’s own properties

A

keeps

59
Q

True or false

Sometimes you are able to identify substances in a mixture

A

true

60
Q

can mechanical mixtures be difficult to determine it pure substance or mixture?

A

yes

61
Q

2 types of mechanical mixtures

A

homogenous’

heterogenous

62
Q

homogenous mixture

A

it looks like one substance but it is not (aka solution) its all mixed together ex: blood

63
Q

heterogenous mixture

A

you can see the different parts that make up the mixture
ex: salad

64
Q

Suspensions

A

cloudy mixtures where tiny droplets of one substance are held within another substance. ex: fruiot juice

65
Q

colloid

A

cloudy mixture exept droplets are so small they do not seperate

ex: milk

66
Q

paper chromatography

A

something used to test if something is a pure substance or a mixture

67
Q

solutions

A

one substance dissolved in another one (aka homogenous mixture)

68
Q

solute

A

the substance that dissolves

69
Q

solvent

A

the substance that does the dissolving

70
Q

Concentration

A

The concentration of a solution can teel you how much solute dissolved into how much solvent

71
Q

To compare concentration you need _____

A

to have the volume of the solvent the same for both solutions then look at the amount of solute

72
Q

concentration is stated as _____

A

of grams of solute dissolved in how much solvent

ex: 50g/100ml

73
Q

How do you calculate concentration?

A

divide amount of solute by the amount of solvent

50g/100ml = 0.5g/100ml

74
Q

flow

A

how we describe fluid movement

75
Q

True or false

Individual particles can move past each other.

A

true

76
Q

The movement of a flow is ________

A

continuous and unbroken

77
Q

Fluids form a _____ not a ______

A

puddle

pile

78
Q

Friction

A

a force that results when 2 objects rub or touch causing resistance

79
Q

Flow Rate

A

Volume of a fluid flowing past a certain point in a certain amount of time

80
Q

Viscosity

A

the resistance of a fluid to flow

A high viscous substance is slow and a low viscous substance is fast

81
Q

Which one of these fluids would flow the fastest? which would be second and which would be last?

Dish soap
water
Corn syrup

A

1.Water
2. Dish soap
3.corn sryup

82
Q

internal friction

A

when individual particles have friction

83
Q

What causes a resistance to flow?

A

internal friction

84
Q

Flow rate _____ as viscosity _______

A

decreases

increases

85
Q

How does tempature affect viscosity?

A

As temp increases, viscosity decrease in liquids but for gases its the opposite

86
Q

How does the type of particle affect viscosity?

A

different particles are more prone to resistance than other particles

87
Q

Density

A

a property that describes how close together particles in matter are close.

88
Q

Formula for Density

A

d = m/v
d = #g/ml

89
Q

If something is more dense it will _____ in something less dense

A

sink

90
Q

If something is less dense it will _____ in something more dense

A

float

91
Q

true or false

different substances have different size shape particles

A

true

92
Q

size of particles affect how many can fit into a given

A

volume

93
Q

the more space between particles the lower the

A

density

94
Q

three states of matter in order of most dense to least.

A

1.Solid
2.Liquid
3.gas

water is an exeption

95
Q

As tempature increases density

A

decreases

96
Q

______ is less dense than air

A

heluim

97
Q

Buoyant Force

A

Upward Force exerted on a object by a fluid, when the object is placed in the fluid

98
Q

Density and Bouyabncy are realted. Density affects how much an object might float, sink, or be neutrally boyant

A

float, sink, or be neutrally boyant

99
Q

______ is less dense than water

A

ice

100
Q

Buoyancy

A

The tendancy of a certain object to float or sink in a fluid., that is denser than the object

101
Q

What causes heavy ships to float

A

their shape

102
Q

floating in water and air have the same

A

scientific principle

103
Q

fuilds can exert a

A

boyant force

104
Q

Positivly Buoyant

A

lift greater than weight causing object to climb

105
Q

Neutrally Buoyant

A

lift same as weight causing object to maintain altidude

106
Q

Negativly Buoyant

A

lift is less than weight causing object to sink/ lower

107
Q

Archimedes Principle

A

an object placed in a fluid will float if it is less dense than the fluid and it will sink if it is more dense than the fluid.

108
Q

the boyant force is equal to the weight of the

A

displaced water

109
Q

Pressure

A

force applied over a specific area at a right angle to a surface

110
Q

As area ____ pressure _____. This can also be reversed

A

increase

decreases

111
Q

Formula for pressure

A

P = F/A

P= #pa(pascals)

112
Q

Pascal’s Law

A

pressure applied to a fluid in a closed system will be transmitted throught the fluid at the same strenght. Pressure will puch on all sides egually.

113
Q

Detergant

A

a substance used to clean laundry/clothes

114
Q

How to Surfants help clean clothes in Laundry Deytergant.

A

Surfants attach themselve to dirt and oil particles which seperates them from fabrics and other materials

115
Q

Why do manufactures no longer use phosphates in detergant

A

polluted water

116
Q

some material in detergant

A

surfacts
optical whiteness
corrosion inhibitor
bleach
fragrance

117
Q

What happens to blood when diving?

A

Pressure decreases rapidly causing nitrogen gas to bubble out, It can cause lots of pain and can kill if left untreated.

118
Q

how a diaphram pump works

A

when the piston is pulled up the intake valve opens and output closes. Fluid is sucked into it and fills cylinder the piston is pushed down on and the intake valve closes outake opens and the fluid goes out of the outake valve.

119
Q

archimedes screw

A

a pump invented by archimedes to remove water from the hold of a ship.

120
Q

Are bicicle pumps, archimeds screws, and diaghpram pumps mainly based on the same idea.

A

yes

121
Q

Why does it become harder to fill more air into a ball or tire as you keep going

A

the air has to keep compressing more and more and more to make room for more

122
Q

Pipline pigs

A

transport oil and natural gases and creates clean fuel supply.

123
Q

Valve

A

device which controls or regulates the amount of flow

124
Q

stuff which use valves

A

1.toilet tank
2.sink tap
3.pump
4. dispenser

125
Q

ballest tanks

A

contols if a subarine floats or sinks

126
Q

how does a submarine stay on the surface

A

the ballest tanks are filled with air

127
Q

how does a submarine dive

A

the air is leaving the ballest tank and water is entering

128
Q

how does a subarine resurface

A

the water is leaving the ballest tank and air is entering

Science 8 (1 decks)

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