Objects Production
Primary 4 · Science and Elementary Technology
Objects Production
Lesson 4 of 5
14 min
Let's begin
At break time the football is lost over the fence. "No problem," says Niyonzima. He collects dry banana leaves, rolls them tightly and ties them with banana fibre. In a few minutes the game starts again!
Banana plants give us much more than food. Let's see what else we can make with them.
The "trunk" of a banana plant is not wood. It is made of many leaf sheaths wrapped tightly round each other, like layers. When they are stripped and dried, they give long, strong threads called fibres. Dry banana leaves are also useful.
One fibre is weak. But when many fibres are twisted together they make a strong string or rope, which is very hard to pull apart. People have made rope by twisting fibres for thousands of years.
Fibres can also be woven: passed over and under each other to make a flat mat or the sides of a basket.

Tip
Strip, dry, twist
One fibre snaps. Many fibres twisted together hold a goat! Teamwork makes fibres strong.
Try each one first, then tap Show answer to check.
Which part of the banana plant gives long fibres?
Answer: The "trunk" (stem), which is made of leaf sheaths.
Why must banana fibres be dried before use?
Answer: Wet fibres go mouldy and rot, and they shrink as they dry, which loosens your work.
Why is a rope stronger than a single fibre?
Answer: A rope is many fibres twisted together, and they share the pull, so it is very hard to break.
Name two useful objects made from banana fibres or leaves.
Answer: Any two of: football, rope, ring pad (ingata), mat, doll, basket.
What you learned today
Sources and credits
The exercises (Try it yourself and the practice questions) are written by Ganzaa.
This lesson adapts CC BY-SA material and is shared under CC BY-SA 4.0.
Quick check
The trunk of a banana plant is made of wood.