a. A sickle to cut sugarcane :

A sickle is made of iron. 

An iron sickle is hard and malleable. 

When sharpened it will be able to cut the hard sugarcane.

b. The sheets used for roofing :

1. The sheets used for roofing are made of plastic, aluminium. 

2. Plastic is hard, hence, protects against weather conditions. 

3. Plastic is transparent, hence, sunlight can pass through it. 

4. Aluminium is hard, light weight and durable, hence, protects against all weather conditions. 

5. Malleable hence formed into thin sheets.

c. A screwdriver :

1. A screwdriver is made up of iron, steel, aluminium.

2. A screwdriver possesses property of hardness hence, it easily pierces a screw in piece of wood, wall, metals etc.

d. A pair of tongs :

1. A pair of tongs are made up of iron, steel aluminium etc. 

Tongs are used to lift hot, boiling utensils or vessels. 

2. Tongs are hard, ductile and malleable. 

3. Hence, have strong grip to hold utensils. 

4. Rubbers fitted on the ends will protect from thermal conduction, from bums.

e. Electric cables :

1. Electric cables are metal wires (thin) wound in plastic. 

2. Metal wires possess the property of hardness, ductility, electrical conductivity. 

3. Plastic /rubber covering possesses the property of hardness, elasticity and are bad conductors of heat and electricity.

f. Ornaments :

1. They are made up of metals like gold and silver. 

2. They possess the property of hardness, ductility, malleability, lustre.

g. Pots and pans :

1. They are used to cook food, hence metals like aluminium, steel are used. 

2. They possess the property of hardness, ductility, malleability, thermal conductivity, electrical conductivity, (microwave ovens)