Hi there, young learners! Welcome back to Primary 3 Basic Science & Technology. In our previous lesson, we learned about Floatation In Air. Today, we’re going to learn about Floatation On Water.
Objectives
By the end of this lesson, you should be able to:
- Identify and list objects that can float on water.
- Show appreciation for the importance of floatation on water.
Floatation On Water
Have you ever wondered why some things float on water while others sink? It’s all about buoyancy, which is the upward force that water exerts on an object. When the upward force of buoyancy is greater than the object’s weight, it floats. But if the weight is greater, it sinks.
What is Buoyancy?
Buoyancy is like a giant invisible hand pushing up on objects in water. It’s caused by the pressure of the water pushing up on the object from below. The more water an object displaces (pushes out of the way), the greater the buoyant force.
Things that Float on Water
Some of the things that float on water include:
- Wood
- Boats
- Leaves
- Apples
- Cork
- Styrofoam
- Life jackets
- Rubber ducks
- Some plastic toys
- And many more!
Importance of Floatation on Water
There are many reasons why floatation on water is important:
- It allows us to travel on water using boats and ships, transporting people and goods .
- It helps us stay safe in water by using life jackets and other flotation devices.
- It makes water activities like swimming, fishing, and boating possible.
- It helps us understand how things work in the world around us, like why boats float and why some things sink.
- It plays a vital role in the ecosystem, allowing aquatic animals to survive and thrive.
Evaluation Questions
Now that you’ve learned about floatation on water, let’s see if you can answer these questions:
- What is buoyancy?
- Can you name three objects that float on water?
- Why is floatation on water important?
- What would happen if things couldn’t float on water?
- Can you think of any other examples of floatation in your daily life?
Conclusion
Today, we learned about floatation on water and how buoyancy plays a crucial role in keeping things afloat just like how floatation in air works. Remember, the next time you see something floating on water, think about the invisible force of buoyancy pushing it up! Keep exploring and learning about the amazing world of science!
