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


In everyday life, we often use the word "weight." You've probably heard someone say, "This toy is heavy," or "This balloon is light." But what do we mean by "weight"? Let's dive into the world of weight and understand what it exactly means. Today we will learn about weight with the help of some simple examples and easy-to-understand explanations.

What is the weight?

Weight tells how heavy or light an object is. When you pick up an object, you can feel whether it is heavy or light. This feeling is what we call weight. Weight is a measurement that tells us how much force gravity is pulling on an object. We measure weight using units such as pounds, kilograms, grams, and ounces.

Suppose you have two bags, one filled with feathers and the other filled with stones. Which bag feels heavier when you pick them up? The bag with the stones will feel heavier, even though both bags seem to be the same size. This difference in the way they feel is due to their weight.

Weight comparison

It's fun to compare the weight of different objects. Let's look at some examples:

1. Watermelon and apple: Watermelon is heavier than apple.
2. A textbook and a sheet of paper: A textbook is much heavier than a sheet of paper.
3. A furry teddy bear and a small coin: The teddy bear is heavy.
4. Basketball and tennis ball: Basketball is heavier than tennis ball.

An exercise with simple shapes

Now, let's visualize the shapes. Look at the scales below. Which side do you think will go down?

In the picture above, the scale with the red rectangle will move down because it is heavier than the blue square. The red rectangle weighs more.

How do we measure weight?

People use scales to measure weight. Just like rulers measure the length of an object, scales tell us how heavy something is. Let's look at the different types of scales:

  • Bathroom scale: The scale that you stand on to check your weight.
  • Kitchen scale: Used to measure food ingredients while cooking.
  • Balance scale: Uses two pans. When two things weigh the same, the pans balance horizontally.

If you've ever opened a recipe book with your parents, you've probably seen them use a kitchen scale. If you want to measure how much flour or sugar you need for a cake, a scale is helpful!

Let's play with weights

Weighing things can be a fun game! You can pick up objects around the house and guess which is heavier. Here are some suggestions:

1. Is the spoon heavier than the fork?
2. Is your shoe heavier than your sock?
3. Which is heavier: the pencil case or the water bottle?
4. Try to guess if your school bag is heavier than a small chair.

Playing like this will make you more aware of the concept of weight. Plus, it's a fun way to understand the world around you.

Comparison with numbers

Sometimes we use numbers to compare weights. For example:

  • One banana: 200 grams
  • One pineapple: 1 kilogram
  • A toy car: 300 grams
  • One bag: 2 kilograms

In these examples, you can compare the numbers to see which object is heavier. A higher number means more weight. For example, a pineapple (1 kilogram) is heavier than a banana (200 grams).

Everyday examples

Weight is everywhere! Let's look at how weight affects us on a daily basis:

  • Fruits and vegetables are weighed at the grocery store to determine how much to price them.
  • When sending a letter or package, postage costs are determined by weight.
  • The more books and other items you put in your school bag, the heavier it will feel.

In each of these cases, it is necessary to understand and measure the weight.

A fun math game with weights

Here's a fun activity you can try with your friends or family:

Gather some household items of different weights, such as a book, a shoe, a toy, and a sponge. Line them up in front of you. Without using a scale, try to guess the weight of each item from lightest to heaviest. Then, use the scale to measure and see if your guesses were correct. You might be surprised by some of the results!

The importance of balance

In some activities, such as playing on a seesaw, the concept of weight is important. To balance a seesaw, both sides must have the same weight. If one side is heavier, it will go down, and the lighter side will go up.

Let's imagine a swing with two children on one side and one child on the other. If the children weigh the same, the part with the two children will go down because it is heavier. Sometimes, adding a person to the lighter part or moving it closer to the center can balance the swing.

Understanding weight units

We measure weight in different units. The two most common systems are metric and imperial. Here are some common units:

  • Metric units: grams and kilograms.
  • Imperial units: ounces and pounds.

Let's quickly look at how they relate to each other:

1 kilogram = 1000 grams
1 pound = 16 ounces
1 kilogram ≈ 2.2 pounds

If you've ever been to a bakery, you've seen pastries measured in grams. When traveling, the weight of your suitcase may be measured in pounds. Knowing the relationship helps to understand both systems.

Why do different materials weigh different things?

Not all substances weigh the same, even if they are the same size! This is because of density. Some substances are denser, which means they have more particles packed inside them, making them heavier.

For example, compare a metal spoon to a plastic spoon of the same size. The metal spoon will feel heavier because metal is denser than plastic.

Exploration activity: Making a simple balance scale

Do you want to make a simple scale at home? Here's how:

  • Materials required: A coat hanger, two small buckets or cups, string.
  • Steps:
    1. Tie a thread on each side of the coat hanger.
    2. Attach a cup to the end of each wire. You now have a simple balance scale!
    3. Hold the hanger in the middle and place different items in the cups.
    4. Watch to see which object is heavier and which side goes down.

Using this simple scale, you'll have a lot of fun comparing the weights of different objects.

Conclusion

Weight is an interesting part of our lives that helps us understand how heavy or light different things are. We use weight to make decisions, from choosing what to carry in our bags to cooking in the kitchen. By practicing and playing with weights, you can become a little scientist, discovering more about the world around you. Remember to use the scales, balance objects, and have fun with weight exploration!


Grade 1 → 4.2


U
username
0%
completed in Grade 1

← Prev (4.1.3)
Using Standard Units (Inches and Centimeters) in Length
Next (4.2.1) →
Comparing Weights

Comments 



Weight

https://www.buddymath.com/g1/4.2?bmal=en