Substrand: "9.3 Materials" (16 periods)

Metals are conductors, non-metals are insulators. Semi-metals behave like metal and non-metals. Metal can react with air this is call rusting and metal also react with acid to produce salt and hydrogen gas. Plastic and fibre are non-metallic substances that are made mainly of carbon atoms. Plastics are used in many manufacturing products that are useful for our daily uses.

Learner's should:

Learner's should:

Learner's should:

9.3.1 know that metals, semi- metals and non-metals have their unique properties (k)

9.3.1.1 identify the different properties of metals: hardness, malleability, ductility, density and conductivity
9.3.1.2 identify properties of Non-metals as: poor conductor, dull, brittle, low melting and boiling point.
9.3.1.3 state that semi-metals have both metallic and non-metallic properties

9.3.2 be able to show that the corrosion of metals is caused by environmental factors (s)

9.3.2.1 demonstrate the corrosion process using iron nails in conditions e.g. i. iron nail in water ii. iron nail in oil iii. iron nail in air

9.3.3 be able to show rates of reaction between dilute acids (s)

9.3.3.1 perform reaction between metals and dilute acids and compare the rate of reactions. metal: Na, Mg, Al, Ca, Fe and Zn dilute acids: Hydrochloric acid, Sulfuric acid and Nitric acid. [O.1M] Use any acid that is available.

9.3.4 know the different uses of alloys in the community (k)

9.3.4.1 identify different types of alloy materials found around the school and community and state; i. what metals they made of ii. uses of the alloys

9.3.5 know the two main types of plastics (k)

9.3.5.1 state the two main types of plastics; i. thermoplastic ii. thermosetting plastic
9.3.5.2 state the materials used to make the plastics

9.3.6 be able to show examples of plastics (s)

9.3.6.1 display the two types of plastic; thermoplastic and thermosetting plastic
9.3.6.2 draw the structures of the two types of plastics

9.3.7 be able to show examples of fibers (s)

9.3.7.1 display different kind of textile fibers; cloths and wool

9.3.8 appreciate the different uses of plastics in the community (a)

9.3.8.1 express the advantage and disadvantage of the uses of plastics