Hi, young learners! Welcome back to Primary 4 Basic Science & Technology. In our previous lesson, we learned about Pure and Impure Water. Today, we’re going to learn about Water (Ice).
Objectives
By the end of this lesson, you should be able to:
- Cognitive Domain: Define freezing and explain the process of freezing water into ice.
- Affective Domain: Appreciate the importance of ice in daily life and develop curiosity about physical changes.
- Social Domain: Collaborate with peers to discuss the uses of ice in various cultural and environmental contexts.
Water (Ice)
Water (Ice) is a fascinating topic that explores the transformation of water from a liquid to a solid state.
What is Freezing?
Freezing is the process where a liquid changes into a solid when its temperature drops below its freezing point. For water, this means turning into ice at 0 degrees Celsius. During freezing, water molecules slow down and arrange themselves into fixed positions, forming a solid structure.
Water as Ice
When water freezes, it expands and becomes ice. This ice is simply water in its solid state. There are many uses for ice, such as:
- Cooling drinks: Ice is commonly used to cool beverages, making them more refreshing to drink.
- Preserving food: Ice helps to preserve food by slowing down the growth of bacteria and preventing spoilage.
- Ice skating: Ice is essential for ice skating, providing a smooth and slippery surface for gliding.
- Medical purposes: Ice is used in medical settings to reduce swelling and pain.
Lesson Evaluation
Now that you’ve learned about Water (Ice), let’s see if you can answer these questions:
- What is freezing?
- Describe how ice feels and looks.
- List two uses of ice that you discussed today.
- Explain why ice is important in daily life.
Conclusion or Summary
We learned that freezing is the process of water changing into ice when its temperature drops below 0 degrees Celsius. Ice is simply frozen water and has many important uses in our daily lives. Don’t forget to check the comments section if you have any questions, and use the navigation to move to the next lesson. See you in the next lesson!
