7C3: Lesson 1 The Earth

Approximately how many different elements are found in the Earth?

• 20

• 80

• 180

• 1000

Which metal is the third most abundant element in the Earths crust?

• Calcium

• Oxygen

• Aluminium

• Silicon

The symbol for Calcium is

• C

• Ca

• Cl

• Cal

The symbol for Carbon is

• C

• Ca

• Cd

• Car

Identify the correct group of NATURAL materials

• Plastics, Ores, Glass, Wood

• Leather, Metal, Slate, Wood

• Plastic, Cotton, Slate, Glass

• Leather, Cotton, Slate, Wood