it is very easy to understand and learn

2. Chapter 6 form 3 science
By timothy young

3. （A）OCCURRING SOLID ELEMENT OR
COMPOUND WITH A DEFINITE
CRYSTALLINE STRUCTURE.
(B）SUCH AS GOLD , SILVER AND
DIAMOND IN SOME ROCKS.
6.1 minerals found in the earth crust

4. NATURAL COMPOUND SUCH AS OXIDES,
CARBONATES SULPHIDES AND SILICATES ARE
IN SOME ROCKS.
(.)MOST OXIDES OF METALS DO NOT BREAK
DOWN WHEN HEATED.
IF SULPHUR DIOXIDE GAS IS THROUGH
PASSING THROUGH A SOLUTION F
ACIDIFIED POTASSIUM THE SOLUTION
CHANGES FROM PURPLE TO COLOURESS.

5. REACTION BETWEEN METALS AND
OXYGEN
METALS +OXYGEN- HEAT – METAL
OXIDE
REACTION BETWEEN METALS AND
SULPHUR
METAL +SULPHUR – HEAT- METAL
SUIPHIDE.
6.2 reaction between metals and non metals

6. SILICA
- COMBINED WITH OXYGEN CALLED
SILICON
- IT OCCURS IN VARIOUS FROM SUCH
AS SAND AND SANDSTONE.
6.3 silicon compounds

7. SILICATE
- COMBINE WITH OXYGEN AND A
METALLIC ELEMENT TO FROM A
COMPOUND
- SILICON AND OXYGEN
- IS PREPARE BY HEATING SILICA AND
SODIUM CARBONATE

8. IS MADE UP FROM CALCIUM CARBON AND
OXYGEN.
- IT OCCUR NATURALLY IN VARIOUS FROM
SUCH AS LIMESTONE , MARBLE AND CHALK.
-HEATED IT PRODUCE CARBON DIOXIDE AND
CALCIUM OXIDE OR QUICK LIME.
DISSOLVES IN WATER TO FORM A SOLUTION
OF A CALCIUM HYDROXIDE OR LIME WATER
WHICH IS AN ALKALI.
6.4 calcium compound

9. - IS REMAIN OF DEAD PLANTS AND ANIMAL
AND HAVE BEEN BURIED IN THE GROUND
FOR MILLION YEARS
FRACTIONAL DISTILLATION OF PETROLEUM
- PETROLEUM IS A MIXTURE OF DIFFERENT
HYDROCARBON WHICH NEED TO BE
SEPARATED FROM ONE ANOTHER BEFORE
THEY CAN BE USEFUL TO US
 6.5 natural fuel resources and their importance

10. - IN INDUSTRY
- FOR TRANSPORT
- AT HOME
- AT WORK
- FOR LEISSURE
Efficient ways to using natural fuels
resources