The hard outermost layer of the Earth is called_________.

• Outer corw

• Crust

Rocks are __________ that are used for making and building objects

• Man made materials

• Natural materials

Some metals such as iron and copper are obtained from rock called__________.

• Lime stone

• Ores

Glass and ceramics are _____________materials

• Natural

• Man -made

Rocks have _________colors and texture

• Same

• Different

The __________ of a material is it's ability to withstand scratches.

• Softness

• Hardness

_________________ is the ability to hold liquid and gases.

• Permeability

• Impermeability

Precious and semi- precious stones are used in making ______________.

• Furniture

• Jewellery

__________ is formed by particles of worn- down rocks mixed with humus.

• Rocks

• Soil

______________ is a type of soil.

• Clayey soil

• Limestone