General questions
Rocks
Minerals
Properties and uses
100
These are clusters of minerals and other inorganic materials.
Rocks
100
These rocks form when molten lava from volcanoes cools and hardens.
Igneous rocks
100
We classify minerals according to their...
Chemical composition
100
Name the tree properties of minerals.

Colour

Hardness

Lustre or shininess

200
These are structured crystals that have specific chemical components.
Minerals
200
These rocks consist of layers of other rock fragments, or animal or plant fossils.
Sedimentary rocks
200
We can find several types of minerals of many different colours and sizes in rocks. This is because there are over ___________ types of minerals in the world.

4 000 (Four thousand)

200
These minerals are hard transparent carbon minerals. They are resistant to scratching.
Diamonds
300

The hot liquid inside volcanoes is called...

Magma
300
Some igneous and sedimentary rock is pushed down by other layers of rock forming on top. Extreme heat and pressure 'bakes' this rock and produce...
Metamorphic rocks
300
These minerals are fragile and contain sulphur, oxygen and another metal.
Sulphates
300
This is a soft and smooth mineral and can vary between white, green or grey. It is used in baby powder.
Talc
400

The hot liquid outside volcanoes is called...

Lava
400
If the lava cools _________________, then large crystals form.
Slowly
400
These minerals are mixtures of metals and oxygen that vary in hardness and colour.
Oxides
400

Some rocks can be carved to make statues. Michelangelo's David is made of very fine...

Marble
500
Rocks and minerals make up the Earth's...
Crust
500
Name an example of metamorphic rock.

Marble

Slate

Gneiss

...

500

These minerals only contain one component.

Elements
500
These are red minerals that belong to the oxides category and are used in jewellery.
Rubies
M
e
n
u