Measuring Mass Using Non-Standard Units Worksheet with balance scales and animals.

Let's solve each question on the "Measuring Mass Using Non-Standard Units Worksheet" step by step. This worksheet uses balance scales to compare the mass of animals with non-standard units (blocks, pencils, erasers).

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1a. What is the mass of the frog?

- The scale shows:
- Left side: 3 blocks (labeled Aa, Bb, Cc)
- Right side: 1 frog
- Since the scale is balanced, the frog has the same mass 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
- If we remove 2 blocks → only 1 block remains on the left
- So now: 1 block vs. 1 frog
- Since 1 block < 3 blocks, the frog is heavier → the frog side will go down

Look at the two options:
- First option: frog side down ✔ (correct)
- Second option: frog side up ✘

✔ Circle the first scale (frog side down)

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2a. What is the mass of the mouse?

- Scale shows:
- Left side: 2 pencils (red and yellow)
- Right side: 1 mouse
- Balanced → mouse = 2 pencils

✔ Answer: 2 pencils

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

- Original: 2 pencils = 1 mouse
- Add 2 more pencils → now 4 pencils on left
- So left side is heavier → left side goes down

Now check the two choices:
- First option: left side (pencils) down ✔
- Second option: right side (mouse) down ✘

✔ Circle the first scale (left side down)

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3a. What is the mass of the bird?

- Scale shows:
- Left side: 3 pencils (blue, red, yellow)
- Right side: 1 bird
- Balanced → bird = 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 = 1 bird
- Remove 1 pencil → 2 pencils on left
- Now: 2 pencils < 3 pencils → so bird is heavier → bird side goes down

Check options:
- First option: bird side down ✔
- Second option: pencils side down ✘

✔ Circle the first scale (bird side down)

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4a. What is the mass of the snail?

- Scale shows:
- Left side: 2 erasers (blue and green)
- Right side: 1 snail
- Balanced → snail = 2 erasers

✔ Answer: 2 erasers

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

- Original: 2 erasers = 1 snail
- Add 2 more erasers → total 4 erasers on left
- Left side becomes heavier → left side goes down

Check options:
- First option: erasers side down ✔
- Second option: snail side down ✘

✔ Circle the first scale (erasers side down)

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✔ Final Answers Summary:

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

This worksheet teaches comparative mass using non-standard units and helps children understand how changing weights affects balance scales. Each answer is based on balancing and comparing masses logically.