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Science > Chapter 5 > Flashcards

Chapter 5 Flashcards

1
Q

s, What is chemical change?

A

A change in the orgininal substance, and more substances being produced in the process

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2
Q

What is a physical change?

A

When the substance stays the same and no new substances are being produced

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3
Q

What is a solution?

A

a uniform mixture of two or
more substances

(looks like a pure substance but it contains more than one type
of particle. clear apple juice)

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4
Q

What is a mixture?

A

a substance that is made up of
at least two different types of particles

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5
Q

What is a mechanical mixture?

A

a mixture in which
you can distinguish between different
types of matter

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6
Q

What is a pure substance?

A

A substance that is made up of only one particle

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7
Q

What is a physical property?

A

A characteristic of a substance that can be determined without altering the substance

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8
Q

What is a chemical property?

A

A characteristic of a substance that is determined when the substance is altered

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9
Q

What is qualitative property?

A

The property of a substance is that is not measured and has no numerical value ( color, odour, texture )

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10
Q

What is quantitative property?

A

The property of a substance that is measured and has numerical value ( temperature, height, mass )

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11
Q

Examples of physical change

A

Change of shape/size

Change of states (solid, liquid, gas)

Dissolving

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12
Q

Examples of chemical change

A

Change of color

Change of odour

Bubbles produced

Precipitates

Change in temperature/light

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13
Q

What are the properties of a solid?

A

Distance between particles are greater/closer

Attractive forces are greater

Speed of particles are slower

Particles are compressed

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14
Q

What are the properties of a liquid?

A

Distance between particles are greater than solid

Attractive forces are less than solids

Speed of particles are faster than solid

Particles are not compressed

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15
Q

What are the properties of a gas?

A

Distance between particles are far appart

The attractive forces are the least in this state

Speed of particles are very fast

There is no compression of particles

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16
Q

What is lustre?

A

shiniess or dullness

(a shiny spoon as high lustre)

17
Q

What is clarity?

A

the ability to let light through

18
Q

what is brittleness

A

breakability or flexibility

(glass is brittle and cracks easily)

19
Q

what is viscosity

A

resistance of a liquid to flowing

low - pours quickly

high - pours slowly

20
Q

what is hardness

A

the relative ability to scratch or be scratched by another substance (wax is hard)

21
Q

malleability

A

ability of a substance to be hammered into thinner sheet or molded

(metal is malleable)

22
Q

ductility

A

ability of a substance to be drawn (pulled) into a finer strand

(copper is ductile)

23
Q

Conductivity

A

Ability of a substance to allow electricity to pass through it

(copper wires have high conductivity)

24
Q

Solubility

A

ability of a substance th solute to form a solution into another substance

(salt + water = salt water)

25
Q

Melting & Boiling points

A

temperature at which vapour pressure equalds to exteernal pressure

!! point where materials change from solids to liquids and liquids to gas

(water to ice, water to water vapour)

26
Q

Crystal form

A

set of crystal faces that are related to eachother by symmetry (diamonds)

27
Q

density

A

measurement of how tighly a material is packed together

(iron has high density)

28
Q

state

A

solid, liquid or gas

(ice, water, water vapor)

29
Q

texture

A

physical feeling of something

(sandpaper has rough texture)

30
Q

MELTING STATE

A

solid — > liquid (HEAT ADDED)

  • ice to water *
31
Q

FREEZING STATE

A

liquid —> solid (HEAT REMOVED)

water to ice

32
Q

VAPORIZATION

A

liquid —> gas (HEAT ADDED)

water to water vapor

33
Q

CONDENSATION

A

gas — > liquid (HEAT REMOVED)

water vapour to water

34
Q

SUBLIMINATION * added heat

A

solid —> gas (HEAT ADDED)

dry ice to C02 (fog)

35
Q

SUBLIMINATION *removed heat

A

gas –> solid (HEAT REMOVED)

water vapour to ice

36
Q

Homogenous solution

A

mix of 2 or more pure substances that mix well together where it dissolves within eachother

ex. sugar + water

37
Q

Heterogenous solution

A

two or more substances that are physically combined and could be seperated by physically means visible differences

cereal + milk
pizza + toppings

38
Q

GRASS STAND FOR?

A

Given
Required
Analysis/formula
Substitute
Sentence

39
Q
A

Science (15 decks)

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