i. what is fertile soil?
il. State three function of a cell?
ili. What is living cell?
b) i. state three acuities that are involved in land preparation for crop production.
ii. explain the term stable equilibrium.
C) Explain briefly the term stable equilibrium
2. i. what is ozone layers?
ii. explain briefly the importance of the ozone layer to human?
b) i. what is corrosion?
ii. name two substances that must be present for iron to corrode
iii. name two metal that do not corrode.
iv) what is an alloy?
c) i. name tow advantage of alloys.
ii. what is atom
3) i. state 2 reasons why sandy soil is not suitable for crop production
ii. Identify one scientific principle involved in each of the following small scale industries:
a. soap production
b. salt making
c. palm oil production
ili. what is a parasite
c. i. Define biological classification
ii. define functional group
4) State in which way each of the following factors is important in the germination of seed
(a)water
(B) Oxygen
(y) Sunlight
(I) Give two important for grafting and budding.
b. state two similarities between combustion and respiration
C. defines potential energy?
ii. what is polymer?
5) i. Distinguish between fish farming and fishing.
if. List five characteristics of Tilapia sp. that make it ideal for pond farming.
b) i. Distinguish between primary colours and secondary colours of light.
li. Give one example each of primary and secondary colours of light.
d) State one use each of the following equipment used in crop production:
i. Garden fork;
ii. Hand trowel;
Ill. Secateurs;
iv. Shares;
V. Mattock.
6. 1. What is functional group?
it. Draw the structure of the following functional groups:
a. Alkanols.
b. Aldehydes
c. Carboxylic acids
b) i. Explain the term photosynthesis.
ii. State two factors that affect the rate of photosynthesis.
c) Define cell membrane.
ii. Explain the importance of the cell membrane in a cell.