Vocabulary

Question 1

Hypothesis

Answer 1

Single unproven assumption or idea which attempts to explain why something happens

Question 2

Theory

Answer 2

A set of hypotheses that ties together a large number of observations of the real world

Question 3

Law

Answer 3

Describes what happens if a known situation occurs, does not predict or explain why

Question 4

Physical property

Answer 4

A property that can be found without creating a new substance ex. Density, colour, hardness, and melting temperature

Question 5

Chemical property

Answer 5

The ability of a substance to undergo chemical reactions and change into new substances ex. Hydrogen’s ability to burn in air and produce water

Question 6

Extensive property

Answer 6

A physical property which depends on the amount of the substance present ex. Mass, volume, length, shape, time required to dissolve a solid

Question 7

Intensive property

Answer 7

A physical property which depends solely on the nature of the substance ex. Density, melting temperature, smell, colour, electrical conductivity, hardness

Question 8

Malleability

Answer 8

The ability to be rolled or hammered into thin sheets

Question 9

Ductility

Answer 9

The ability to be stretched or drawn into wires

Question 10

Lustre

Answer 10

The manner in which a solid reflects light

Question 11

Viscosity

Answer 11

The resistance of a fluid to flow

Question 12

Diffusion

Answer 12

The intermingling of fluids as a result of motion within the fluid

Question 13

Vapour

Answer 13

The gaseous material formed by the evaporation of a substance

Question 14

Homogenous substance

Answer 14

A substance consisting of only one phase

Question 15

Heterogenous substance

Answer 15

A substance consisting of more than one phase ex. Pencil, human

Question 16

Pure substance

Answer 16

A substance that is homogenous and has an unchangeable composition ex. Sugar, water, copper, iron

Question 17

Mixture

Answer 17

Multiple types of molecules

Question 18

Mechanical mixture

Answer 18

Heterogenous mixture of two or more substances ex. Gravel, pencil

Question 19

SOLUTION

Answer 19

Homogenous mixture of two or more substances

Question 20

Solvent

Answer 20

The component in a solution that is greater

Question 21

Solute

Answer 21

The component in a solution that is the smaller quantity

Question 22

Compound

Answer 22

A pure substance made up of two or more types of atoms, but a SINGLE TYPE OF MOLECULE

Question 23

Evaporation

Answer 23

Boiling away the liquid in a solid in liquid solution, leaving the solid

Question 24

Distillation

Answer 24

Heating a liquid-in-liquid solution to book away the liquid with the lower boiling temperature, which is turned into vapour and passed through a system that cools it and turns it back into liquid

Question 25

Miscible

Answer 25

Two liquids are miscible if they are mutually soluble in each other in all portions ex. Water and alcohol

Question 26

Immiscible

Answer 26

Two liquids are immiscible if they are insoluble in each other, ex. Water and vegetable oil