Grade 1
  1. Numbers and Counting  1.1. Counting to 10  1.2. Counting to 20  1.3. Counting to 50  1.4. Counting to 100  1.5. Writing Numbers 1 to 10  1.6. Writing Numbers 1 to 20  1.7. Writing Numbers 1 to 50  1.8. Writing Numbers 1 to 100  1.9. Reading Numbers 1 to 10  1.10. Reading Numbers 1 to 20  1.11. Reading Numbers 1 to 50  1.12. Reading Numbers 1 to 100  1.13. Comparing Numbers  1.14. Ordering Numbers  1.15. Odd and Even Numbers  1.16. Number Patterns  1.17. Skip Counting by 2s, 5s, and 10s  1.18. Understanding Zero
  2. Basic Addition and Subtraction  2.1. Understanding Addition  2.2. Addition Facts within 10  2.3. Addition Facts within 20  2.4. Adding Zero  2.5. Adding One More  2.6. Adding Two More  2.7. Adding Three More  2.8. Adding Using Pictures  2.9. Addition Word Problems  2.10. Understanding Subtraction  2.11. Subtraction Facts within 10  2.12. Subtraction Facts within 20  2.13. Subtracting Zero  2.14. Subtracting One  2.15. Subtracting Two  2.16. Subtraction Using Pictures  2.17. Subtraction Word Problems  2.18. Introduction to Doubles Facts  2.19. Introduction to Making 10
  3. Place Value and Number Sense  3.1. Understanding Tens and Ones  3.2. Counting by Tens  3.3. Place Value within 20  3.4. Place Value within 50  3.5. Place Value within 100  3.6. Reading and Writing Two-Digit Numbers  3.7. Comparing Two-Digit Numbers  3.8. Decomposing Numbers
  4. Measurement  4.1. Length  4.1.1. Comparing Lengths  4.1.2. Measuring with Non-Standard Units  4.1.3. Using Standard Units (Inches and Centimeters) in Length  4.2. Weight  4.2.1. Comparing Weights  4.2.2. Heavy and Light Objects  4.2.3. Introduction to Grams and Pounds  4.3. Capacity  4.3.1. Comparing Capacity  4.3.2. Full and Empty  4.3.3. Introduction to Liters and Milliliters  4.4. Time  4.4.1. Telling Time to the Hour  4.4.2. Telling Time to the Half Hour  4.4.3. Days of the Week  4.4.4. Months of the Year  4.4.5. Understanding Yesterday, Today, and Tomorrow  4.5. Money  4.5.1. Recognizing Coins  4.5.2. Counting Coins  4.5.3. Introduction to Dollar and Cents Symbols  4.5.4. Simple Addition and Subtraction with Money
  5. Geometry  5.1. 2D Shapes  5.1.1. Recognizing 2D Shapes  5.1.2. Drawing 2D Shapes  5.1.3. Naming 2D Shapes  5.1.4. Properties of 2D Shapes  5.1.5. Sorting 2D Shapes  5.1.6. Composing Simple Shapes  5.2. 3D Shapes  5.2.1. Recognizing 3D Shapes  5.2.2. Naming 3D Shapes  5.2.3. Properties of 3D Shapes  5.2.4. Sorting 3D Shapes  5.3. Position and Direction  5.3.1. Left and Right  5.3.2. Above and Below  5.3.3. Inside and Outside  5.3.4. Near and Far  5.3.5. In Front and Behind
  6. Patterns and Sorting  6.1. Recognizing Patterns  6.2. Extending Patterns  6.3. Creating Patterns  6.4. Sorting by Color  6.5. Sorting by Shape  6.6. Sorting by Size
  7. Data and Graphing  7.1. Introduction to Data  7.2. Collecting Data  7.3. Tally Marks  7.4. Bar Graphs  7.5. Picture Graphs  7.6. Interpreting Simple Graphs
  8. Fractions  8.1. Understanding Halves  8.2. Understanding Fourths  8.3. Dividing Shapes into Equal Parts  8.4. Identifying Equal and Unequal Parts

Grade 1 → Measurement → Weight ↓


Heavy and Light Objects


Learning about heavy and light objects helps us understand the concept of weight. Weight is an important idea in math and science. When we look at different objects, we can compare them to see which objects are heavy and which are light.

What does heavy and light mean?

Heavy and light are terms we use to compare the weight of objects. A heavy object is one that is difficult to lift or carry because of its large weight. A light object is one that is easy to lift because it does not weigh much.

Visual example: comparing weights

Let's look at some simple examples to understand heavy and light objects better.

lights Heavy

In this picture, the blue box is lighter than the green box. We know this because it is smaller, so it usually weighs less.

How to compare weights

We can use different methods to compare the weights of objects.

1. Using your hands

A simple way to tell if an object is heavy or light is to lift it. If it is easy to lift, it is light. If it is difficult to lift, it is heavy. Try comparing two objects, such as a pencil and a book. When you lift them, you may feel that the book is heavier than the pencil.

2. Using a balance scale

We can also use a tool like a scale. A scale has two sides.

Place an object on each side. If both sides are at the same level, the objects will weigh the same. If one side goes down, the object on that side is heavier. Try placing an apple on one side and a feather on the other. The side with the apple will go down.

Why is it important to understand heavy and light?

Understanding heavy and light bags helps us make wise choices. For example, when shopping for groceries, we need to lift bags. It helps to know which bags are heavy so that we can carry them safely.

Real-life examples

Here are some more examples of heavy and light objects:

  • The elephant is heavier than the cat.
  • A bag full of books is heavier than a bag full of papers.
  • A gallon of milk is heavier than an empty bottle.

Activities to learn about weight

Here are some fun activities:

  • Measure the weight of your toys: Use a simple scale or your hands to measure the weight of different toys. Arrange them from lightest to heaviest.
  • Nature walk: Collect natural objects such as leaves, rocks and sticks. Compare their weights and guess which is the lightest or the heaviest.
  • Story time: Read stories about animals or objects, and think about which characters are heavy or light.

Simple math in heavy and light

Basic math helps us describe the weight of objects. When we talk about weight, we can use numbers to tell us “how much” something weighs.

Writing stories with weight

Create short stories using heavy and light objects. For example:

"Once upon a time, there was a feather and a rock. The feather was so light you might have thought it wasn't there. The rock was big and heavy. One day, the feather flew above the ground, while the rock stayed still. People picked up the feather easily, but they had to use both hands to lift the rock."

Use of numbers in weights

In higher grades, children can use tools such as ounces and pounds to measure weight.

Basic math terms for weight

In everyday life, we use words like "ounce", "pound" and "kilogram". These help us understand quantities better.

Kilogram (kg) > Gram (g) > Milligram (mg)
pound (lb) > ounce (oz)

Here's a very simple example:

  • A small bag of sugar can weigh 1 kilogram.
  • One roti can weigh around 500 grams.

Conclusion

Learning about heavy and light objects is a basic but important skill. It helps children understand balance, weight, and comparison. Starting with hands-on activities and then moving on to more structured scales can make this learning process fun.

As children grow older, they will use more elaborate equipment and units. Having an early understanding makes the transition easier. It encourages curiosity and critical thinking, paving the way for more complex math and science topics.

Let's continue exploring the world of weights with our hands, scales, and fun stories.


Grade 1 → 4.2.2


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Comparing Weights
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Introduction to Grams and Pounds

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Heavy and Light Objects

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