Problem Overview:
The task involves estimating the weight of various objects and animals in grams (g) or kilograms (kg). The goal is to choose the best estimate for each item based on common knowledge about their typical weights.
Solution:
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1. Carrot
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Options: 18 grams, 4 kilograms
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Explanation: A carrot is a small vegetable and typically weighs around 100–200 grams. The option "18 grams" is more reasonable than "4 kilograms," which is far too heavy.
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Answer:
18 grams
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2. Football
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Options: 20 grams, 16 kilograms
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Explanation: A standard football (soccer ball) weighs around 400–500 grams. The option "20 grams" is too light, while "16 kilograms" is far too heavy.
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Answer:
20 grams
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3. Pig
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Options: 900 grams, 90 kilograms
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Explanation: A pig is a large animal and can weigh hundreds of kilograms. The option "900 grams" is far too light, while "90 kilograms" is a reasonable estimate.
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Answer:
90 kilograms
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4. Ice Skate
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Options: 1,600 grams, 1 kilogram
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Explanation: An ice skate is relatively heavy but not extremely so. The option "1,600 grams" (or 1.6 kg) is more realistic than "1 kilogram," as skates are made of metal and other materials that add weight.
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Answer:
1,600 grams
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5. Cat
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Options: 3,700 grams, 7 kilograms
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Explanation: A typical house cat weighs around 3–5 kilograms. The option "3,700 grams" (or 3.7 kg) is closer to this range than "7 kilograms," which is slightly heavier but still plausible.
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Answer:
3,700 grams
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6. Frog
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Options: 3 grams, 300 grams
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Explanation: A frog is a small amphibian and typically weighs a few hundred grams. The option "3 grams" is far too light, while "300 grams" is a reasonable estimate.
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Answer:
300 grams
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7. Newspaper
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Options: 100 grams, 1 kilogram
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Explanation: A newspaper is relatively light. The option "100 grams" is more realistic than "1 kilogram," which is far too heavy for a single newspaper.
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Answer:
100 grams
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8. Feather
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Options: 1 gram, 50 grams
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Explanation: A feather is very lightweight. The option "1 gram" is much more reasonable than "50 grams," which is far too heavy.
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Answer:
1 gram
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9. Camel
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Options: 650 kilograms, 65,000 kilograms
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Explanation: A camel is a large animal and can weigh several hundred kilograms. The option "650 kilograms" is reasonable, while "65,000 kilograms" is far too heavy.
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Answer:
650 kilograms
Final Answers:
1.
18 grams
2.
20 grams
3.
90 kilograms
4.
1,600 grams
5.
3,700 grams
6.
300 grams
7.
100 grams
8.
1 gram
9.
650 kilograms
Boxed Final Answer:
\[
\boxed{18 \text{ grams}, 20 \text{ grams}, 90 \text{ kilograms}, 1,600 \text{ grams}, 3,700 \text{ grams}, 300 \text{ grams}, 100 \text{ grams}, 1 \text{ gram}, 650 \text{ kilograms}}
\]
Parent Tip: Review the logic above to help your child master the concept of grams to kilograms worksheet.
