CHEMISTRY FORM 1
- 1.1 What is matter?
- 1.2 What is Chemistry?
- 1.3 What does matter consist of?
- 1.4 Are the particles in matter stationary?
- 1.5 Arrangement, distance, and attraction between particles
- 1.6 Properties of matter (volume, shape and compression)
- 1.7 Conductors and non-conductors
- 1.8 Sources of heat
- 1.9 Bunsen burner
- 1.10 Role of Chemistry in society
- 2.1 Pure substances
- 2.2 Mixtures
- 2.3 Separation of Mixtures
- 2.4 Separation of solid-solid mixture
- 2.5 Separation of insoluble solid-liquid mixture
- 2.6 Separation of soluble solid-liquid mixture (solution)
- 2.7 Separation of immiscible liquid-liquid mixture
- 2.8 Separation of miscible liquid-liquid mixtures (solution)
- 2.9 Separation of liquid-gas mixture
- 2.10 Selecting and using appropriate methods of separating mixtures
- 2.11 Kinetic theory of matter
- 2.12 Classification by physical states
- 2.13 Effect of heat on physical states
- 2.14 Effect of impurities on melting and boiling points
- 2.15 Permanent and non-permanent changes
- 2.16 Definitions, chemical symbols and equations
- 3.1 Simple acid-base indicators
- 3.2 Universal indicators and pH scale
- 3.3 Reactions of acids with metals
- 3.4 Reactions of acids with carbonates and hydrogen-carbonates
- 3.5 Reactions of acids with bases
- 3.6 Effects of acids on substances
- 3.7 Applications of acids and bases
- 4.1 Composition of Air
- 4.2 Fractional distillation of liquid air
- 4.3 Rusting
- 4.4 Oxygen
- 4.5 Burning of substances in air
- 4.6 Atmospheric pollution
- 5.1 Candle wax and water
- 5.2 Reactions of metals with liquid water
- 5.3 Reaction of metals with steam
- 5.4 Preparation of hydrogen gas
Introduction to Chemistry: Conductors and non-conductors
1.0 Introduction to Chemistry
1.7 Conductors and non-conductors
Which materials around us are conductors of electricity?
Materials and substances required
- Copper, wood, charcoal and the other substances listed in the table of results
- Dry cell, cell holder, connecting wires with crocodile clips, torch bulb/ammeter
Watch the video, test for conductors and non-conductors
Substances which allow electricity to pass through them cause electric bulb to glow, or ammeter pointer to move. They are called conductors. Substances which do not allow electricity to flow through them are non-conductors.
- From the demonstration, classify the tested materials as conductors and non-conductors by putting a tick against conductors and cross (X) against
Table of results
- From what you have observed, what class of materials
- conduct electricity
- do not conduct electricity Hint: Select answers from liquids, metals, solids, non-metals, gases, plastics
Observe the demonstration conduction test for some more materials; then answer Question 2.
Answers to Questions 1.7
At homeCell phone charger, TV cables, electrical wiring of the house and equipment, and overhead cables that supply electricity to us are made of copper and aluminium. These are the best known conductors after silver, which is rare and expensive.
Copper wire (cable)
NB: Chemistry is largely about electrical charges. Besides, electricity as a form of energy is used in chemical and manufacturing processes.