Week Eight
Subject: Basic Science
Week of the Second Term: 8th Week
Topic: Condensation of Water
Subtopics:
- Definition and explanation of condensation
- Demonstration of water condensation
Instructional Objectives
At the end of the lesson, pupils should be able to:
- Define condensation and explain the process in their own words.
- Identify real-life examples of condensation they observe in their environment.
- Conduct a simple experiment to demonstrate the process of condensation.
Entry Behaviour
Pupils should already know the basic states of matter (solid, liquid, gas) and have an understanding of evaporation. They should be familiar with observing changes in weather, such as dew forming on grass in the morning.
Instructional Materials
- Clear glass jar with a lid
- Ice cubes
- Hot water
- A thermometer (optional)
- Chart showing the water cycle (optional)
Reference Materials
Ijiyemi, C. (2016). Foundations of Sci. & Tech for Primary School Book 4. Metropolitan Publishers. Lagos.
Oyinlola, M., Rahaman, B., & Ezeume, I. (2015). Basic Science and Technology for Primary School Book 4 (Bec Edition). Spectrum Book Limited. Lagos.
Content
Condensation of Water
Definition and Explanation of Condensation
Condensation is the physical process by which water vapor (gas) transforms into liquid water. This phenomenon occurs when warm, moist air cools down, leading to a decrease in the energy of the water vapor molecules. As a result, these molecules lose their kinetic energy and come together to form liquid droplets.
Examples of Condensation:
- Common real-life examples of condensation include:
- Dew: Water droplets that form on grass and leaves during the night as temperatures drop.
- Fog: A thick cloud of tiny water droplets suspended in the air, often forming in the early morning or evening when temperatures are cooler.
- Water on Cold Glass: When warm, moist air comes into contact with a cold glass, water vapor condenses on the surface, creating droplets.
Demonstration of Water Condensation
Objective: To visually demonstrate the process of condensation and understand how water vapor changes into liquid water.
Materials Needed:
- Clear glass jar with a lid
- Ice cubes
- Hot water
- Thermometer (optional)
- Paper towels (for cleanup)
Procedure:
Step 1: Preparation
- Gather Materials: Ensure all materials are ready for the demonstration.
- Fill the Jar: Pour hot water (approximately 200-250 ml) into the clear glass jar. Be careful while handling hot water to avoid burns.
Step 2: Setting Up for Condensation
- Add Ice: Place several ice cubes on the lid of the jar. Make sure the lid is tightly sealed onto the jar to prevent steam from escaping.
- Observation: Ask the pupils to observe the steam rising from the hot water as the jar is sealed. Explain that the steam is water vapor.
Step 3: Observing Condensation
- Wait and Watch: Allow the setup to sit for a few minutes. Encourage pupils to observe the lid of the jar during this time.
- Observation of Condensation: After a few minutes, pupils should notice water droplets forming on the inside of the lid.
- Discussion: Explain that this process is called condensation. As the warm, moist air inside the jar rises and meets the cold surface of the lid (cooled by the ice), the water vapor loses energy and transforms back into liquid water, forming droplets.
Step 4: Conclusion
- Summarize the Process: Reinforce that condensation is the process of water vapor turning into liquid water. This is an essential part of the water cycle and helps explain natural phenomena like dew forming on grass or fog.
Step 1: Introduction
Lesson Presentation (Step-by-Step Procedure)
Others removed.
