Question 1
- Differentiate between vent eruption and fissure eruption
- Name three intrusive volcanic features
Answer
- - Vent eruption involves magma comes out through one vent or pipe and pile up ; while fissure eruption involves magma coming out through many cracks of fissures and spread over a wide area.
-
- Batholith
- lopolith
- Laccolith
Question 2
- What is a longitude
- What is the longitude of station X when it is 8.00am while in Nairobi at longitude 37oE the time is 12.00 noon
Answer
- - This is the angular distance showing how far a place is west or east of the prime meridian
-
Time difference = 12.00 – 8.00
= 4 hrs = 4 x 15
= 60o
Longitudinal difference = 60 – 37
= 130 W
Question 3
- State three causes of earth movements
- Name two main earthquake zones in the world
Answer
-
- Istatic adjustment
- Gravitative pressure
- Magma movement within the crust -
- The curcum pacific belt
- The mid Atlantic ridge
Question 4
- State three conditions necessary for the development of a karst scenery
- Give two reasons why there are a few settlements in karst landscape
Answer
-
- Thick limestone which is well jointed
- Soluble rocks
- Deeply situated water table -
- Bare rugged rocks or outcrops
- Several steep sided dry valley
Question 5
- Name three types of coral reefs
- What are the benefits of coral reefs in the areas they have developed
Answer
-
- Barrier reef
- Fringing reef
- Atolls reef -
- Sheltered water encourages growth of plankton /fish food
- Shallow corals are a tourist attraction earning a country foreign exchange