2. MINERALS
The Earth’s crust is made up of rocks.
The rock is made up of minerals.
A mineral is a solid substance with a definite chemical
composition.
Silicates are minerals made up of oxygen and silicon.
The rest of minerals are called non-silicates.
4. The physical properties of minerals are
characteristics which can be observed and determined
easily.
Types: Mohs hardness scale
Colour
Luster
Hardness
Streak
Fractures and cleavage
THE PHYSICAL PROPERTIES OF
MINERALS
5. ACTIVITIES
3. What property does a mineral have if we
can break it up easily into thin sheets?
4. What properties do you need to consider to
describe a mineral?
5. What is the hardest mineral? And the
weakest?
6. Rocks are aggregates of minerals which have been
formed in a natural process.
TYPES OF ROCKS:
Sedimentary rocks. Ex: Limestone and clay.
Metamorphic rocks. Ex: Marble and slate
Magmatic rocks. They can be: Plutonic rocks and
volcanic rocks. Ex: Granite and basalt.
ROCKS
7. ACTIVITIES
6. What are the rocks?
7.What types of rocks do you know?
8. Write down two rocks of each type of rock.