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Form 1 Geography: Rocks and Minerals Topical Questions and Answers

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Get detailed Geography Rocks and Minerals Topical Questions and Answers for Form 1, available for instant delivery via WhatsApp, email, or direct download.
1. (a) Describe the following characteristics of minerals
(i) Colour
Distinct appearance by colour used to identify
specific minerals eg. Gold is yellow.
(ii) Cleavage
Tendency of mineral to break in certain direction.
Some minerals break along planes on which atomic
bonds are relatively weak.
(iii) Hardness
Ability to resist scratching. Various minerals have
varying degree of hardness eg. Talc is softest while
Diamond is hardest.
(b) (i) Give two types of igneous rocks
- Volcanic rocks\extrusive igneous rock.
- Plutonic rocks/intrusive igneous rocks.
(ii) Explain three conditions necessary fro the growth of coral polyps
• The water should be salty
• Water should be clear free from silt.
• Sea water should be warm with temperatures between 20°C to
29°C
• Shallow water with depth not exceeding 60m.
• Polyps must be in submerged condition.
• Water should be well oxygenated.
(c) State four uses of rocks
• Some unique rocks e.g. crying stone of Kakamega present
spectacular scenery for tourist attraction which helps earn the
country some foreign exchange.
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