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science > chemical change > Flashcards

chemical change Flashcards

1
Q

physical properties

A

It affects a substance by separating the mixture. e.g When ice cubes melt it turns into liquid

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2
Q

chemical properties

A

properties that describe how different substance can be combined to form new or different chemicals

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3
Q

flammability

A

It is an indicator when something is about to catch on fire

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4
Q

reactivity

A

It is a measure of how a substance reacts

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5
Q

toxicity

A

A poisonous substance mixed with chemicals in your body that is harmful to your health

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6
Q

melting

A

When turning a solid into a liquid

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7
Q

evaporation

A

When liquid evaporates and turns into gas

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8
Q

freezing/solidification

A

Turning a liquid back into a solid at a cold temperature also known as solidification

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9
Q

condensation

A

when turning a gas back into a liquid

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10
Q

sublimation

A

The changing of a solid into a gas without turning into a liquid

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11
Q

deposition/desublimation

A

It is the reverse prosses of sublimation, changing a gas back into a solid without turning into a liquid
also known as desublimation

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12
Q

solid

A

It is a state of matter that has a fixed shape

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13
Q

liquid

A

It is a state of matter that has no fixed shape

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14
Q

gas

A

it is a state of matter that can move quickly and has a large amount of space

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15
Q

precipitate

A

A solid product of a chemical reaction that does not dissolve in water

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16
Q

products

A

It is a new chemical substance made from a chemical reaction

17
Q

reactants

A

A chemical substance made up a chemical reaction

18
Q

chemical reaction

A

It is a chemical change in two or more substance are produced

19
Q

reaction rate

A

It is the speed of the chemical reaction that is taking place

20
Q

catalyst

A

It is a chemical that helps or speeds up the chemical reaction

21
Q

Rusting

A

the corrosion of iron

22
Q

corrosion

A

A chemical reaction the wears away iron and other metals. oxygen and water both combine to rust metals

23
Q

surface protection

A

A surface coat that protects the substance from corrosion

24
Q

galvanising

A

It is covering a substance that will react to corrosion first

25
Q

rust

A

A brown substance formed when metals have been corroded

26
Q

burning

A

mixing a substance with oxygen that in a flame

27
Q

oxidation

A

a chemical reaction that involves losing electrons by a substance

28
Q

fossil fuel

A

a substance that is coal, oil and natural gas it is formed by animal remains over millions of years. it is used for fuel to produce heat

29
Q

combustion

A

the process of combining with oxygen and burning with flame

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