Let’s go step by step through each true/false question.
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1. Gram is the unit for measuring smaller masses -
✔ True
We use grams (g) to measure small things like a pencil, an apple, or a book. For bigger things like a person or a car, we use kilograms (kg). So yes — gram is for smaller masses.
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2. Many, many years ago cubit was used to measure volume
✘ False
The cubit was an old way to measure
length, not volume. People used it to measure how long something was — like cloth or wood — using the length from elbow to fingertip. Volume is about space inside something (like water in a bottle), and that wasn’t measured with cubits.
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3. At noon, when the sun is overhead, the shadow is the shortest
✔ True
At noon, the sun is highest in the sky. When the sun is directly above you, your shadow falls right under you and becomes very short — sometimes almost invisible! That’s why shadows are shortest at noon.
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4. Soft music is considered noise
✘ False
Noise usually means loud, unpleasant, or disturbing sound. Soft music is gentle and often relaxing — people enjoy it! So soft music is NOT considered noise. Noise would be like construction sounds or shouting.
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5. Air is made up of 78 parts of oxygen
✘ False
Actually, air is mostly
nitrogen — about 78%. Oxygen is only about 21%. So this statement has the numbers mixed up. It should say: “Air is made up of 78 parts nitrogen.”
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6. Season change everyday
✘ False
Seasons change slowly over months — not every day! We have spring, summer, autumn, winter — each lasts about 3 months. The weather might change daily, but seasons do not.
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Final Answer:
1. True
2. False
3. True
4. False
5. False
6. False
Parent Tip: Review the logic above to help your child master the concept of worksheet for 3rd grade science.
