Lesson Notes By Weeks and Term - Senior Secondary 1

Water supply

Get it on Google Play
Get it on the Apple App Store
  1. Home
  2. Lesson Notes By Weeks and Term
  3. Senior Secondary 1
  4. Water supply

TERM – 2ND TERM

WEEK ONE

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: HEALTH EDUCATION

Topic: WATER SUPPLY

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Define water

II.) Identify the sources of water

III.) Discuss the purification of water

IV.) Identify the uses of water.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher introduces water and discuss the various sources of water.

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher discuss the purification and uses of water.

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

WATER SUPPLY

Water is a transparent, odorless, tasteless liquid compound composed of hydrogen and oxygen molecules (H2O). It is essential for the survival of all known forms of life and is the most abundant substance on Earth's surface, covering about 71% of its surface. Water exists in three states: solid (ice), liquid (water), and gas (water vapor).

Sources of water

  1. Rain: Rainwater is a natural source of freshwater that falls from the atmosphere in the form of precipitation. It is a vital component of the Earth's water cycle, replenishing surface water bodies such as rivers, lakes, and reservoirs, as well as groundwater aquifers.
  2. Borehole: A borehole is a narrow, deep hole drilled into the ground to access groundwater. Boreholes are constructed using specialized drilling equipment and can reach depths where groundwater is present.
  3. Rivers: Rivers are natural watercourses that flow continuously in a channel from higher to lower elevations. They are fed by precipitation, groundwater discharge, and runoff from surrounding areas.
  4. Streams: Streams are small, flowing bodies of water that are part of the river network. They originate from springs, runoff, or melting snow and flow into larger rivers or lakes.
  5. Spring: A spring is a natural source of groundwater where water flows to the surface of the earth. It occurs where an aquifer intersects with the ground surface, resulting in water seepage or flow. Springs can vary in flow rate and water quality depending on geological conditions.
  6. Well: A well is a man-made structure dug or drilled into the ground to access groundwater. Wells can be shallow or deep, depending on the depth of the water table or aquifer.

Purification of Water

  1. Filtration: Filtration is a common method used to remove suspended particles, sediment, and debris from water. It involves passing water through a porous material such as sand, gravel, or activated carbon, which traps impurities and allows clean water to pass through.
  2. Boiling: Boiling water is an effective method to kill bacteria, viruses, and other pathogens that may be present. Bringing water to a rolling boil for at least one minute (or longer at higher altitudes) ensures microbial safety. .
  3. Chemical Disinfection: Chemical disinfection involves adding chemicals such as chlorine, iodine, or chlorine dioxide to water to kill or inactivate pathogens. These chemicals are effective against a wide range of microorganisms but may impart a taste or odor to the water.
  4. Distillation: Distillation is a process that involves heating water to its boiling point to produce steam, which is then condensed back into liquid form. This method effectively removes contaminants that have a higher boiling point than water, such as heavy metals, salts, and volatile organic compounds.
  5. Reverse Osmosis: Reverse osmosis (RO) is a filtration process that uses a semipermeable membrane to remove ions, molecules, and larger particles from water. It works by applying pressure to overcome osmotic pressure and force water through the membrane, leaving behind impurities.

Uses of Water

  1. Water is essential for hydration and preparing food and beverages.
  2. Water is used for bathing, handwashing, and maintaining personal hygiene. It is also essential for cleaning and sanitation in households, healthcare facilities, and food processing industries.
  3. Water is crucial for irrigating crops, livestock watering, and aquaculture. It plays a vital role in agricultural production and food security.
  4. Water is used in various industrial processes, including manufacturing, cooling, cleaning, and energy production.
  5. Water-based recreational activities such as swimming, boating, fishing, and water sports are popular leisure pursuits.
  6. Water is essential for supporting aquatic ecosystems, wetlands, and wildlife habitats.

EVALUATION: 1. What is water?

  1. Identify and discuss 4 sources of water
  2. Identify 4 ways of purifying water
  3. Mention 4 uses of water.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively