SHS-2 Syllabus – Hydrological cycle

2.1.1 explain the distribution of the earth's water.

Distribution of the earth's water:
Groundwater
Surface water (fresh water, marine water)

discuss where earth's water is located and how much of it is available for human use.

NOTE:
Percentage distribution of water on the earth's surface to be mentioned.

Draw a hydrological cycle and comment on its importance to plants and animals.

2.1.2 explain the relevance of the hydrological cycle to plants and animals.

Relevance of hydrological cycle.

discuss the processes involved in the hydrological cycle using appropriate diagrams.

2.1.3 outline the main sources of water contamination and the effects on humans.

Main sources of water contamination: domestic waste, commercial waste, industrial and mining waste, agricultural waste, radioactive waste, and “special” waste such as waste from hospitals.

Effects of water contamination:
water-related diseases and infections.

discuss the various sources of water contamination to include items listed under content.

discuss the effects such as water-related diseases under the following headings: water-borne, water-washed, water-based and insect based diseases.

gather more information on the topic using search engines on the internet.

Give one example each of the following water related diseases:
(i) water-washed
(ii) water-borne
(iii) water-based

2.1.4 describe household water conservation methods.

Discuss household water treatment, waste water treatment, safe water storage, modern and traditional rainwater harvesting systems.

PROJECT:
1. Gather information on modern and traditional rainwater harvesting system from the following sources:
i. interviewing people in the community, ii. library, websites and scientific journals

2. Design a simple water harvesting technique or a domestic water reuse system.

Discuss the importance of rainwater harvesting