Measurement and units (T3 W2)
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Measurement is the process of determining the size, length, or amount of something. In our daily lives, we measure things like the length of a pencil, the weight of a bag of flour, or the volume of water in a bottle. Common units of measurement include centimeters (cm), meters (m), grams (g), and liters (L). Understanding these units helps us compare different objects and quantities.
Let's measure the length of a desk. If we use a ruler, we can see that the desk is 120 cm long. This means that if we laid 120 one-centimeter blocks end to end, they would equal the length of the desk. Remember, when measuring, always start from the '0' mark on the ruler to get an accurate measurement.
Now, let's practice measuring together! Pair up with a classmate and choose an object in the classroom, like a book or a chair. Use a ruler to measure its length in centimeters. Write down your measurement and share it with the class. Discuss any differences you find in measurements and why they might occur. This will help us understand the importance of accuracy in measurement.
Now it's your turn to solve some measurement problems on your own! Here are a few questions: 1) If a pencil is 15 cm long and an eraser is 5 cm long, how much longer is the pencil than the eraser? 2) A bottle holds 2 liters of water. If you pour out 1 liter, how much water is left? Show your working for each problem on your paper.
Answer: Centimeters
Centimeters are commonly used to measure small lengths, like pencils.
Answer: 1.5 m
There are 100 centimeters in a meter, so 150 cm is equal to 1.5 meters.
Answer: Grams
Grams are the unit used to measure weight.
Answer: Liters
Liters are used to measure the volume of liquids.
Answer: 1.5 liters
Subtracting 0.5 liters from 2 liters leaves you with 1.5 liters.
Answer: Ruler
A ruler is specifically designed for measuring lengths.
Answer: Kilograms
Kilograms are a common unit for measuring weight.
Answer: 100
There are 100 centimeters in one meter.