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S4.1.1 Glossary Flashcards

(31 cards)

1
Q

Atom

A

The smallest part of matter

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2
Q

Boiling

A

When a liquid becomes a gas when it is heated

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3
Q

Boiling point

A

The temperature at which a substance boils

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4
Q

Bonding

A

How atoms are chemically joined together

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5
Q

Change of state

A

When a substance changes from one state to another

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6
Q

Chemical change

A

An irreversible change in a substance to form a new product

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7
Q

Condensing

A

When a gas cools to become a liquid

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8
Q

Density

A

A measure of a substance’s mass per unit volume

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9
Q

Evaporation

A

When a liquid is heated to become a gas

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10
Q

Freezing

A

When a liquid cools to become a solid

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11
Q

Gas

A

A state of matter with particles which are spread far apart

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12
Q

Gas pressure

A

A force exerted by gas particles colliding with the walls of a container

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13
Q

Impure

A

A substance containing more than one element or compound

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14
Q

Kinetic energy

A

The energy store of moving objects

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15
Q

Kinetic theory

A

The rapid, constant motion of particles in a gas

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16
Q

Liquid

A

A state of matter with particles that can flow over one another

17
Q

Mass

A

A measure of the amount of matter in an object

18
Q

Melting

A

When a solid is heated to become a liquid

19
Q

Melting point

A

The temperature at which a substance melts

20
Q

Mixture

A

Substance containing more than one element or compound

21
Q

Molecule

A

Substance made of more than one atom joined together

22
Q

Physical change

A

A reversible change where a substance changes state

23
Q

Pure substance

A

Substance containing only one element or compound

24
Q

Solid

A

A state of matter with particles in fixed positions

25
Specific heat capacity
Energy required to heat 1kg of a substance by 1°C
26
Specific latent heat
Energy required to change the state of 1kg of a substance, without changing temperature
27
SLH of fusion
Energy required to melt 1kg of a substance, without changing temperature
28
SLH of vaporisation
Energy required to evaporate 1kg of a substance, without changing temperature
29
Sublimation
When a solid becomes a gas, without becoming a liquid first
30
Thermal energy
The energy store of hot objects
31
Volume
A measure of the space an object takes up