Explanation

(a) Solution (a) Igneous rocks
(1) Formed from cooled and solidified magma
(2) Hardened rocks
(3) Can be formed beneath the earth as intrusive rocks. Examples are gabbro, granite, etc.
(4) Or on surface of the earth as extrusive rocks
(5) Contain crystals
(6) Are either acidic or basic
(7) Vary in colour (light or dark)
(8) Crystal's size vary from specks to glassy mass
(9) Non-stratified
(10) Do not contain fossils.

(b) Importance of metamorphic rocks
(1) Marble for floor tiles
(2) Graphite for lead pencils
(3) Gneiss for construction purposes
(4) Slate, marbles are minerals/raw materials for industries
(5) Kaolin for ceramic products
(6) Foreign exchange earnings e.g from graphite, marble, etc
(7) Emeralds for jewelry 
 

• What is the best meaning of: Foreign Trade Foreign Marketing Multinational Marketing? Answer this

  1 Answers   ·   Commerce   ·   41 minutes ago
• A triangle has sides 8cm and 5 cm and an angle of 90 ° between the . calculate the smallest... Answer this

  1 Answers   ·   Mathematics   ·   3 hours ago
• What course can I study with this results 👇 Mathematics B3 Economics A1 Civic Education B2 English C5 Marketing B3... Answer this

  0 Answers   ·   Economics   ·   6 hours ago