Measuring Mass Using Non-Standard Units Year Teaching, 58% OFF - Free Printable

Let's solve each part of this "Measuring Mass Using Non-Standard Units Worksheet" step by step. The goal is to determine the mass of different animals using non-standard units (like blocks, pencils, erasers), and then predict how the balance scale would look if items are added or removed.

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1a. What is the mass of the frog?

Image shows:
- Left side: 3 blocks (labeled A, B, C)
- Right side: 1 frog
- Scale is balanced

✔ So, the frog weighs the same as 3 blocks.

Answer:
👉 3 blocks

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1b. What would the scale look like if you took 2 blocks away?

Original: 3 blocks = 1 frog
Now remove 2 blocks → 1 block left on the left side

So now:
- Left: 1 block
- Right: 1 frog

Since the frog is heavier than 1 block, the frog side will go down, and the block side will rise.

Look at the two options:

- First scale: left side lower (blocks side down) → ✘ wrong (only 1 block vs frog)
- Second scale: right side lower (frog side down) → ✔ correct

Answer:
👉 Circle the second scale (frog side down)

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2a. What is the mass of the mouse?

Image shows:
- Left side: 2 pencils (red and yellow)
- Right side: 1 gray mouse
- Scale is balanced

✔ So, the mouse weighs the same as 2 pencils

Answer:
👉 2 pencils

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2b. What would the scale look like if you added 2 pencils?

Original: 2 pencils = mouse
Add 2 more pencils → total 4 pencils on the left

Now:
- Left: 4 pencils
- Right: mouse (still 2 pencils worth)

So, left side is heavier → left side goes down

Look at the options:

- First scale: left side down → ✔ correct
- Second scale: right side down → ✘ wrong

Answer:
👉 Circle the first scale (left side down)

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3a. What is the mass of the bird?

Image shows:
- Left side: 3 pencils (blue, red, yellow)
- Right side: 1 purple bird
- Scale is balanced

✔ So, the bird weighs the same as 3 pencils

Answer:
👉 3 pencils

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3b. What would the scale look like if you took 1 pencil away?

Original: 3 pencils = bird
Remove 1 pencil → 2 pencils left on left side

Now:
- Left: 2 pencils
- Right: bird (3 pencils worth)

So, bird is heavier → right side goes down

Look at the options:

- First scale: left side down → ✘ wrong (pencils only 2, bird is heavier)
- Second scale: right side down → ✔ correct

Answer:
👉 Circle the second scale (bird side down)

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4a. What is the mass of the snail?

Image shows:
- Left side: 2 erasers (blue)
- Right side: 1 yellow snail
- Scale is balanced

✔ So, the snail weighs the same as 2 erasers

Answer:
👉 2 erasers

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4b. What would the scale look like if you added 2 erasers?

Original: 2 erasers = snail
Add 2 more erasers → total 4 erasers on left

Now:
- Left: 4 erasers
- Right: snail (2 erasers worth)

So, left side is heavier → left side goes down

Look at the options:

- First scale: left side down → ✔ correct
- Second scale: right side down → ✘ wrong

Answer:
👉 Circle the first scale (erasers side down)

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✔ Final Answers Summary:

| Question | Answer |
|--------|--------|
| 1a | 3 blocks |
| 1b | Circle the scale where frog side is down |
| 2a | 2 pencils |
| 2b | Circle the scale where pencils side is down |
| 3a | 3 pencils |
| 3b | Circle the scale where bird side is down |
| 4a | 2 erasers |
| 4b | Circle the scale where erasers side is down |

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This worksheet teaches comparison of mass using non-standard units and helps children understand balance, addition, and subtraction in a real-world context. The key idea is that when the scale is balanced, both sides have equal mass — and changing one side changes the balance accordingly.