Mathematics Kindergarten 10 min

Heavy and light

Compare weights of objects

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Introduction & Learning Objectives

Learning Objectives Identify an object as heavy or light. Compare two objects to see which is heavier. Compare two objects to see which is lighter. Use the words 'heavy', 'light', 'heavier', and 'lighter'. Predict if an object is heavy or light by looking at it. Understand that a balance scale goes down for heavy things. Can you lift a big elephant 🐘? Or a tiny feather 🪶? Which one is heavy? Today, we will learn about heavy and light things. We will see how to tell which is which. It helps us understand our world! 🌎 Real-World Applications Picking up your toys 🧸 Helping carry groceries 🍎 Choosing a backpack for school 🎒 Playing on a seesaw with friends 🤸
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Key Concepts & Vocabulary

TermDefinitionExample HeavyHeavy means it is hard to lift. It weighs a lot. 💪A big rock is heavy. 🪨 LightLight means it is easy to lift. It does not weigh a lot. 😊A balloon is light. 🎈 HeavierWhen you have two things, the heavier one is harder to lift.A book 📖 is heavier than one piece of paper 📄. LighterWhen you have two things, the lighter one is easier to lift.A crayon 🖍️ is lighter than a lunchbox 🍱. Balance ScaleA tool that helps us see what is heavy. The heavy side goes down. 👇If you put a brick on one side, it will go down.
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Core Formulas

The Heavy Rule Heavy = ⬇️ On a balance scale or seesaw, the heavy side always goes down. The Light Rule Light = ⬆️ On a balance scale or seesaw, the light side always goes up. The Same Rule Same = ➡️⬅️ If two things weigh the same, the scale stays flat and balanced.

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Sample Practice Questions

Challenging
A balance scale has 1 small rock 🗿 on one side and 10 feathers 🪶 on the other. The scale is balanced. What does this tell you?
A.The rock is heavier
B.The feathers are heavier
C.1 rock weighs the same as 10 feathers
D.Rocks and feathers are the same
Challenging
You have a ball of clay. You squish it flat like a pancake. Is the flat pancake of clay heavier, lighter, or the same weight as the ball?
A.Heavier
B.Lighter
C.It weighs the same
D.It disappears
Challenging
A small boat 🛶 is floating. You put a very heavy rock inside it. What will happen to the boat?
A.It will float higher
B.It will sink lower in the water
C.It will fly away
D.Nothing will change

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