Who is Heavier?
Understanding Weight, Comparing Objects, and Measurement Units
Weight is how heavy something is! We explore the simple concepts of **heavy and light**, learn to compare objects without a scale, and discover the standard units we use to measure weight globally.
How to Use This Demo
- Select a concept below to explore weight and mass.
- Learn the units: **gram ($\text{g}$)** for light things and **kilogram ($\text{kg}$)** for heavy things.
- Practice **comparing** the weight of common objects.
- Use the **Classification** module to sort objects by their weight category.
- Test your measurement knowledge with the **Practice Quiz** button.
Observation:
Weight is a measure of the pull of gravity on an object's mass. Heavier objects have more mass and are harder to lift. We use standardized units for accurate measurement.
The Standard Units of Weight
Key Units: Gram ($\text{g}$) and Kilogram ($\text{kg}$):
We use the Metric System for weight. The primary unit is the Kilogram ($\text{kg}$).
| Unit | Abbreviation | Used to Measure | Real-World Example |
|---|---|---|---|
| Gram | $\text{g}$ | Light objects (spices, pencil, feathers) | A paperclip weighs about $1 \text{ g}$. |
| Kilogram | $\text{kg}$ | Heavy objects (people, bags of flour, fruit) | A standard school textbook weighs about $1 \text{ kg}$. |
Conversion:
The relationship between these units is fundamental for comparing weights:
$$1 \text{ kilogram} = 1000 \text{ grams}$$Comparing Objects:
Before using a scale, we can estimate: objects that are denser or larger often weigh more. The side of a simple balance scale that holds the **heavier** object will always move **down**.
