Hi, young learners! Welcome back to Primary 4 Basic Science And Technology. In our previous lesson, we learned about Product of Technology in Transportation. Today, we’re going to learn about Shapes.
Objectives
By the end of this lesson, you should be able to:
- Identify different shapes.
- Distinguish between 2-Dimensional and 3-Dimensional shapes.
- Recognize and name common solid shapes.
Shapes
Shapes are all around us! They help us understand and describe the world. There are two main types of shapes:
What are 2D Shapes?
2D shapes are flat shapes that have two dimensions: length and width. They are like drawings on a piece of paper.
Some of the common 2D shapes include:
- Circle: A round shape with the same distance from its center to any point on its boundary. Think of a coin or a pizza!
- Square: A shape with four equal sides and four right angles. Imagine a box of chocolates or a window pane.
- Triangle: A shape with three sides and three angles. Look at a slice of pizza or a traffic sign.
- Rectangle: A shape with four sides, where opposite sides are equal and four right angles. Think of a door or a book.
- Pentagon: A shape with five sides and five angles. The Pentagon building in the United States is shaped like this!
- Hexagon: A shape with six sides and six angles. Look at a honeycomb or a stop sign.
What are 3D Shapes?
3D shapes are solid shapes that have three dimensions: length, width, and height. They are like real objects you can hold in your hands.
The main 3D shapes are:
- Cube: A solid shape with six equal square faces. Think of a dice or a sugar cube.
- Sphere: A solid shape resembling a ball, with a curved, continuous surface. Imagine a basketball or a globe.
- Cylinder: A solid shape with two circular bases connected by a curved surface. Think of a can of soup or a toilet paper roll.
- Cone: A solid shape with a circular base and a single curved surface that tapers to a point. Think of an ice cream cone or a party hat.
- Rectangular Prism (or Box): A solid shape with six faces, all of which are rectangles. Imagine a shoebox or a brick.
- Pyramid: A solid shape with a polygonal base and triangular faces that meet at a common vertex. Think of the pyramids of Egypt or a tent.
Evaluation
Now that you’ve learned about shapes, let’s see if you can answer these questions:
- Can you name a 2-Dimensional shape that has four sides?
- What is the difference between a square and a rectangle?
- Name a 3-Dimensional shape that has a circular base and a point at the top.
Conclusion
We learned about two types of shapes: 2D shapes, which are flat, and 3D shapes, which are solid. We also learned about some common examples of each type of shape. Remember, shapes are everywhere around us! Keep looking for them and learning about them. See you in the next lesson!
