Question

the table below lists the properties of four materials derived from minerals.
some properties of the materials in the table make them useful in everyday objects. choose the list below that identifies the minerals in the table that would be most useful
in each of these numbered objects.

1. white paint
2. filament in

incandescent bulb

1. pencil \lead\
2. emery board

Explanation:

Step1: Analyze each object's property needs

• White Paint: Needs a material that is white, resists corrosion. Rutile has titanium which can be white and resist corrosion.
• Filament in Incandescent Bulb: Needs a material that is strong, has high melting point. Wolframite has tungsten which is strong and has a high melting point.
• Pencil “Lead”: Needs a soft, easily powdered, opaque material. Graphite (carbon - based) is soft, can be powdered, and is opaque.
• Emery Board: Needs a hard, scratch - resistant material. Corundum (aluminum oxide) is hard and scratch - resistant.

Answer:

1—rutile; 2—wolframite; 3—graphite; 4—corundum