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SCHEME OF WORK
Biology
Form 3 2024
TERM I
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 1
ECOLOGY
Concepts of ecology.
By the end of the lesson, the learner should be able to:

To differentiate between autecology and synecology.
Define various concepts used in ecology.

Exposition- Teacher exposes new concepts and explains their underlying meanings.
text book
KLB BK III. P 33 CERTIFICATE PG36
1 2
ECOLOGY
Abiotic factors in an ecosystem.
By the end of the lesson, the learner should be able to:
To describe various abiotic factors that affect distribution of organisms.
Detailed discussion of effect of light, temperature, pressure, wind, humidity, salinity, pH on distribution of organisms.
text book
KLB BK III. P 34. CERTIFICATE PG38
1 3
ECOLOGY
Measuring abiotic factors.
By the end of the lesson, the learner should be able to:
To measure abiotic factors that affect distribution of organisms.
Group activities- Measuring temperature, humidity, pH.
Answering related questions.
Thermometers
pH meter e.t.c.
KLB BK III. P 34. CERTIFICATE PG39
1 4-5
ECOLOGY
Measuring abiotic factors.
Biotic inter-relationships. - Competition.
- Predation.
By the end of the lesson, the learner should be able to:
To measure abiotic factors that affect distribution of organisms.
To differentiate between intraspecific and interspecific competition.
To interpret graphs representing competition between two species.
To define an ecological niche and a habitat.
Group activities- Measuring temperature, humidity, pH.
Answering related questions.

Teacher exposes new concepts.


Teacher leads in interpreting graphs showing competition.

Q/A: Deductions from graphs.
Thermometers
pH meter e.t.c.
Chart , graphs.
text book
KLB BK III. P 34. CERTIFICATE PG39
KLB BK III. P 35. CERTIFICATE PG 50
2 1
ECOLOGY
- Parasitism.
By the end of the lesson, the learner should be able to:
To distinguish parasitism from predation.
To differentiate between endoparasites and ectoparasites.
To identify adaptive features of parasites.
Q/A: Pairs of parasites and hosts.
Examine specimens of endoparasites and ectoparasites.
Discuss economic importance of parasites.
Specimens of endoparasites and ectoparasites.
KLB BK III. P 37. CERTIFICATE PG 53
2 2
ECOLOGY
- Symbiosis and Saprophytism.
By the end of the lesson, the learner should be able to:
To define symbiosis and saprophytism.
To explain economic importance of symbiosis and saprophytism.
Detailed discussion.

Examples of symbiants and saprophytic organisms.
text book
KLB BK III. P 38. CERTIFICATE PG  57
2 3
ECOLOGY
The Nitrogen cycle.
Trophic levels.
By the end of the lesson, the learner should be able to:
Describe the nitrogen cycle.
Explain importance of micro-organisms in root nodules of plants.
Discuss flow chart of nitrogen cycle.
Chart-Nitrogen cycle.
Flow chart- Energy flow in an ecosystem.
KLB BK III. PP 40-41. CERTIFICATE PG58
2 4-5
ECOLOGY
Food chains.
Food webs.
By the end of the lesson, the learner should be able to:
To define a food chain.
To give examples of food chains.
To identify trophic levels of organism(s) in a food chain.

To interpret food webs.
Teacher gives an illustration of a food chain; then gives specific examples.
Q/A: Trophic levels of organisms in a food chain.


Teacher illustrates a food web in a given habitat.
Emphasis is laid on direction of arrows.
Answer questions derived from food webs.
chart
charts
KLB BK III. P 42. CERTIFICATE PG46
KLB BK III. P 43. CERTIFICATE PG47

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