Question 1
The diagram below shows the structure of the earth. Use it to answer the following questions.
- Name the part marked A, B, C
- Give three characteristics of part marked B.
Answer
-
A - Atmosphere
B - Mantle
C - Gutenberg discontinuity -
- The outer part is elastic, solid while the inner part is viscous fluid
- The outer part is rich in perioditite while the inner part is rich in Olivine
- Has high temperatures (higher than crust)
Question 2
- Differentiate between a meteor and a meteorite
-
The table below shows the elements of weather and the isoline used to represent them
name a,b,c,d
Answer
- Meteor is a streak of light that is seen in the sky on a clear night while a meteorite is a meteoroid which has not completely burnt up and managed to reach the surface of earth
-
a - Isoneph
b - Atmosphere pressure
c - Isotherm
d - Rainfall
Question 3
- Name three types of igneous rocks
- State three factors that determines the size of crystal igneous rocks
Answer
-
- Quartz
- Granite
- Peridotite -
- Degree of acidity
- Rate of cooling
- Depth
Question 4
Give three characteristics of podzol soils
Answer
- They are acidic
- They are heavily leached
- Have well developed soil profile
- They are heavily leached
- Have well developed soil profile
Question 5
State four significances of humus in soils
Answer
- Supply plants with nutrients
- Food for micro-organisms in the soil
- Decomposition gives acid that continues weathering process
- Have high water holding capacity
- Food for micro-organisms in the soil
- Decomposition gives acid that continues weathering process
- Have high water holding capacity