Class 3 Notes - Length, Weight, Qualtity, Time and Temperature

1. Length

Length is a measure of how long something is. It is one of the most basic measurements we encounter in our daily lives.

Units of Length:

  • Millimeter (mm)
  • Centimeter (cm)
  • Meter (m)
  • Kilometer (km)

Example: Convert 3 meters to centimeters:

3 meters = 3 × 100 = 300 centimeters.

2. Weight

Weight refers to how heavy or light an object is. It is a measure of the force exerted on an object due to gravity.

Units of Weight:

  • Gram (g)
  • Kilogram (kg)

Example: Convert 5 kilograms to grams:

5 kilograms = 5 × 1,000 = 5,000 grams.

3. Quantity

Quantity refers to how much or how many of something there is. It is a general term used in mathematics to describe the amount or number of items.

Units of Quantity:

  • Liter (L)
  • Milliliter (mL)

Example: Convert 3 liters to milliliters:

3 liters = 3 × 1,000 = 3,000 milliliters.

4. Time

Time is a measure of the duration of events. It helps us understand the sequence of events and how long things take to happen.

Units of Time:

  • Second (s)
  • Minute (min)
  • Hour (h)
  • Day (d)

Example: Convert 3 hours to minutes:

3 hours = 3 × 60 = 180 minutes.

5. Temperature

Temperature measures how hot or cold something is.

Units of Temperature:

  • Celsius (°C)
  • Fahrenheit (°F)

Example: Convert 20°C to Fahrenheit:

20°C = 68°F.

Conclusion

Understanding length, weight, quantity, time, and temperature is essential for daily life. These measurements are crucial for solving real-world problems and developing a deeper understanding of the world around us.