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Science Exam Revision Sem.2 > Physical And Chemical Change > Flashcards

Physical And Chemical Change Flashcards

(46 cards)

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1
Q

What’s boiling

A

A change of state where liquid is heated and turned into a gas. This is called evaporation

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2
Q

Chemical change

A

A change that results in a new substance being formed

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3
Q

Condensation

A

Change of state where a gas is cooled and forms a liquid

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4
Q

Contraction

A

Decrease in size

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5
Q

Deposition

A

A change of state from gas to solid

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6
Q

Endothermic

A

Process that absorbs energy from surroundings

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7
Q

Evaporation

A

Particles vibrate as temperature rises causing particles to escape from the surface, creating a gas

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8
Q

Exothermic

A

Gives off energy in form of heat light or sound

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9
Q

Expansion

A

Increase in size

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10
Q

Freezing

A

Change of state from ,liquid to solid. Vibrations slow down allowing force of attraction to pull particles together creating a solid

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11
Q

Melting

A

Change of state from solid to liquid: particles vibrate faster, lessening force of attraction and causing particles to move away from each other

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12
Q

Physical change

A

Change where no new substance is created, but changes appearance of object

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13
Q

Precipitate

A

Substance formed during a chemical change

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14
Q

Solidification

A

When a substance changed from liquid to solid (freezing/cooling)

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15
Q

Solution

A

A substance where the mixture is mixed on the atomic level

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16
Q

Sublimation

A

Change of state from solid to gas

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17
Q

Diffusion

A

A process where to liquids or two gases mix due to the motion of their particles

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18
Q

Particle model

A

Simplified representation of the particles in a solid liquid and gas

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19
Q

Density

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A

Measure of mass per unit volume do a substance = d= m/v (unit g/cm3

20
Q

Displaces

Study These Flashcards
A

Pushes upwards, as im pushes water upwards

21
Q

Mass

Study These Flashcards
A

Measures how much is in a substance (unit:g)

22
Q

Volume:

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A

Measures how much space is occupied by a substance

23
Q

Atom

Study These Flashcards
A

Smallest building block that make up all matter

24
Q

Chemical reaction

Study These Flashcards
A

When atoms rearrange to create a new substance

25
Formula equation
A type of chemical equation where the chemicals in the reaction are represented by there chemical formulas
26
Molecule
Cluster of atoms
27
Products
Substances formed in a Chemical reaction
28
Reactants
Starting substance in a chemical reaction
29
Word equation
Type of chemical equation where the chemicals are represented by there chemical name
30
Allotropes
Different forms of the same element
31
Atoms
The smallest building blocks of matter
32
Brittle
Easily crumbled or shattered
33
Ductile
About to be stretched to form a wire
34
Elements
Substances made if only one type of atom
35
Lattices
Grid like structure of atoms
36
Malleable
Able to be hammered into sheets
37
Metals
Substances that have a metallic shine, conduct heat and electricity, and can be hammered into sheets are drawn into a wire
38
Molecules
Cluster of atoms
39
Monotomic
Elements that Consists of one single atom
40
Non-metals
Dull, brittle, do not conduct heat and electricity
41
Periodic table
A table that Shows all known elements, there are 118 known elements
42
Properties
The characteristics of a substance
43
Alloys
A mixture of metals with other metals or non-metals
44
Compounds
Substances made of lattices or identical molecules with two or more types of atoms
45
Immiscible
Liquids that do not mix
46
Mixtures
Any combination of two or more elements and compounds

Science Exam Revision Sem.2 (2 decks)

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