Earth’s Mat. Sht_2
This Homework requires GRAPH PAPER!
1. What is a metal ore?
2. Why are most metals found in the earth as ores?
3. Why have there been gold rushes in various parts of the world, but no Aluminium rushes?
4. Contrast the differences between the production processes used to produce Aluminium metal and iron metal from their respective ores.
5. The table below gives estimates (1998) of how long the world’s metal supplies will last.
a) Present this information as a bar chart
b) Aluminium has only 30 years supply left. How could this time be extended, even if no more aluminium ore was discovered?
c) Gold, copper and silver belong to a group of elements in the periodic table called the coinage metals. Explain what properties of these metals means they are useful for making coins.
d) Metals can be arranged in to a reactivity series. Usinmg the observations noted in the table below arrange the metals into a reactivity series, the most reactive first.
