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Measuring Mass with Scales
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Measuring Mass with Scales
⚖️ Part 1: Understanding Mass and Scales
1. What is mass?
How big something looks
The amount of matter in an object
How tall something is
The colour of an object
2. Which units do we use to measure mass? (Select all that apply)
Grams (g)
Kilograms (kg)
Metres (m)
Litres (L)
3. Which object would you measure in grams?
A car
A pencil
A person
A washing machine
4. Before measuring with a digital scale, what should you do first?
Turn it upside down
Zero the scale (tare function)
Shake it gently
Put it on a soft surface
📏 Part 2: Measuring and Recording
5. Look at this scale reading: 1.25 kg. How many grams is this?
Answer: _____________ grams
6. Complete the measurement table. Estimate first, then record the actual mass:
Object: Textbook
My estimate: _______ grams
Actual mass: _______ grams
Object: Apple
My estimate: _______ grams
Actual mass: _______ grams
Object: Water bottle (full)
My estimate: _______ grams
Actual mass: _______ grams
My estimate: _______ grams
Actual mass: _______ grams
Object: Apple
My estimate: _______ grams
Actual mass: _______ grams
Object: Water bottle (full)
My estimate: _______ grams
Actual mass: _______ grams
7. Order these objects from lightest to heaviest based on your measurements:
1st (lightest): _________________
2nd: _________________
3rd (heaviest): _________________
8. Convert these measurements:
a) 2500 grams = _______ kilograms
b) 0.75 kilograms = _______ grams
c) 1.2 kilograms = _______ grams
🤔 Part 3: Thinking About Mass
9. Explain why we use different units (grams vs kilograms) for different objects:
10. Extension Challenge: If you have two identical books and together they weigh 2.4 kg, what is the mass of one book?
Show your working:
Answer: _____________
Answer: _____________
11. Reflection: What did you learn about measuring mass today? Why is it important to use the correct units?
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