Objective

By the end of this lesson, you will be able to measure, record, compare, and estimate the masses of objects using informal units.

Materials and Prep

Materials: Various objects of different weights (e.g., toys, books, fruits), a balance scale (could be a homemade one using a ruler and a pencil), paper, pencil.

Prep: Make sure to have the objects ready for weighing and the balance scale set up.

Activities

1. Weigh and Record: Have fun weighing different objects using the balance scale. Write down the weights of each object on a piece of paper.

2. Compare Weights: Compare the weights of two objects. Which one is heavier? Which one is lighter?

3. Estimate the Weight: Without weighing, try to estimate the weight of an object. Then weigh it to see how close your estimate was!

Talking Points

• Quotation: "Weight tells us how heavy or light something is. We use scales to measure weight."
• Quotation: "When we measure weight, we write down the number to remember how heavy or light something is."
• Quotation: "Comparing weights helps us see which object is heavier and which is lighter."
• Quotation: "Estimating weight is like making a guess about how heavy something is. It's fun to see if our guesses are close!"