Science - Chemistry

Front 1

What are Physical Properties?

Back 1

are characteristics that can be determined without changing the composition of the substance. It can be either quantitative or qualitative

Front 2

Examples of Qualitative physical properties are?

Back 2

luster, optical clarity, brittleness, viscosity, hardness, malleability, ductility and electrical conductivity

Front 3

Examples of Quantitative physical properties?

Back 3

mass. height and temperature

Front 4

What are Chemical Properties?

Back 4

describe the ability of a substance to change its composition to form new substances

Front 5

What do pure substances have?

Back 5

characteristics physical properties such as density, melting/freezing point and boiling point

Front 6

Solids are usually _____ than liquids but ice is less dense than ____ when its temperature is close to its _____

Back 6

Solids are usually denser than liquids but ice is less dense than water when its temperature is close to its melting point. This allows ice to float on water

Front 7

Examples of Physical change?

Back 7

change of size or shape, change of state and dissolving

Front 8

Examples of Chemical change?

Back 8

colour change, odour change, gas produced, a precipitate produced, or a temperature change

Front 9

Salt

Back 9

Salt lowers the freezing point of water but causes corrosion and threatens the ecosystem

Front 10

Particle theory

Back 10

a theory that describes the composition and behavior of matter

Front 11

Pure substance

Back 11

a substance that is made up of only one type of particle

Front 12

Physical property

Back 12

a characteristic of a substance that can be determined without changing the composition of the substance

Front 13

Physical change

Back 13

a change in which the composition of a substance remains unaltered and no new substances are produced

Front 14

Precipitate

Back 14

a solid that separates from a solution

Front 15

Mixture

Back 15

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

Front 16

Melting Point

Back 16

the temperature at which a substance changes state from a solid to a liquid

Front 17

Solution

Back 17

a uniform mixture of two or more substances

Front 18

Viscosity

Back 18

the degree to which a fluid resists flow

Front 19

Alloy

Back 19

a solid solution of two or more metals

Front 20

Qualitative property

Back 20

a property of a substance that is not measured and does not have a numerical value, such as colour, odour and texture

Front 21

Chemical Change

Back 21

a change in the starting substance or substances and the production of one or more new substances

Front 22

Characteristic Physical property

Back 22

a physical property that is unique to a substance and that can be used to identify the substance

Front 23

Density

Back 23

a measure of how much mass is contained in a given unit volume of a substance; D = mass/volume

Front 24

Freezing point

Back 24

the temperature at which a substance changes state from a liquid to a solid; melting point and freezing point are at the same temperature for a substance

Front 25

Boiling point

Back 25

the temperature at which a substance changes state rapidly from a liquid to a gas