Objects Production
Primary 4 · Science and Elementary Technology
Objects Production
Lesson 3 of 5
13 min
Let's begin
At Habimana's home, the washed plates are left on the ground to dry, and the chickens walk over them. His mother sighs. Habimana has an idea: "I can build a rack from sticks, so the plates dry up high!"
Objects that help us do a job are called utility objects. Today you will learn to make one from sticks.
A toy is made for playing. A utility object is made to be useful. Sticks can make many utility objects:
A good stick for building is:
Use fallen sticks, or sticks cut by an adult from bushes that may be cut. Never damage young trees or trees in protected areas.
Leave cutting with a knife or panga to an adult. Smooth rough ends so they do not give you splinters.
Tip
Dry, straight, strong
Before you use a stick, give it the three-word test. If it fails one, find another stick!
Try each one first, then tap Show answer to check.
Is a pen holder a toy or a utility object?
Answer: A utility object, because it does a useful job: it holds pens and pencils.
Umutoni used green sticks, freshly cut, for her stool. A week later the joints were loose. Why?
Answer: Green sticks shrink as they dry, so the string or joints became loose. She should use dry sticks.
Name one way to join two sticks.
Answer: Tying (lashing) with string, fibre or thin wire; nailing; or slotting one into another.
What you learned today
Sources and credits
Written by Ganzaa.
The exercises (Try it yourself and the practice questions) are written by Ganzaa.
Quick check
A toy is made to be useful, and a utility object is made for playing.
