AT4 Science all notes

Question 1

homogenous mixture

Answer 1

the components that make up the mixture are uniformly
distributed throughout the mixture. (e.g. salt water)

Question 2

hetrogenous mixture

Answer 2

the components of the mixture are not uniform and have
localised regions with different properties. (e.g. oil and water)

Question 3

Mixture

Answer 3

The parts of a mixture do not change their
properties i.e. has a blend or ‘average’ of the
substances which form it.

Question 4

Compound

Answer 4

The elements that make up a compound lose their properties; the new compound has its own properties.

Question 5

Solute

Answer 5

what is being dissolved

Question 6

Solvent

Answer 6

the substance in which the solute dissolves

Question 7

Solution

Answer 7

A mixture of solute and solvent

Question 8

Soluble

Answer 8

able to be dissolved

Question 9

Insoluble

Answer 9

incapable of being dissolved

Question 10

Saturated

Answer 10

When a particular solvent has dissolved as much solute as possible

Question 11

Unsaturated

Answer 11

the solvent can still dissolve more solute

Question 12

Concentration

Answer 12

When a solvent contains large amounts of solute

Question 13

dilute

Answer 13

When a solvent contains only a small amount of
solute

Question 14

The cell theory

Answer 14

• All living things are composed of one or more cells.
• Cells are the basic units of structure and
  function in an organism.
• Cells come only from the reproduction of
  existing cells.

Question 15

The particle theory

Answer 15

• All matter is made up of small particles.
• These particles are always moving.
• When a substance is heated, its particles move faster.
• When a substance is cooled, its particles move slower.
• The particles are held together by forces which vary in strength.

Question 16

The 5 kingdoms of life

Answer 16

bacteria, protists, fungi, plants, animals