about things around us: to help us understand how things work. Questions can be answered through a science Investigation. Read each item carefully. Write the letter of the best before the number. 1. What made the hard-boiled egg spin longer compared to the fresh egg? A. Its eggshell is harder. C. was cooked longer. 8. Its contents are sold. D. Its yolk is of the center. 2. What do you think will happen if you used salted egg instead of hard-boiled egg? A. I will not spin at all. B. It will spin like a fresh egg. C. will spin like a hard boiled egg. D. It will spin more slowly than the fresh egg- 3. What do you think will happen if you used a small balloon filled with water instead of a fresh egg? A. It will spin like a fresh egg. Cll will spin like a hard-boiled egg. B. It will spin like a salted egg. D. It will spin faster than the hard-boiled egg 4. Which characteristic of the ruler hanging over the edge produced a higher pitch? A longer 8. shorter C.thicker D. wider 5. If you used a long pencil instead of a ruler, how would it behave when plucked? A. It will not vibrate. B. It will produce a sound. C will make a very loud sound. D. I will make a very high-pitched sound.
Answer (1)
1. D. Its yolk is off the center.(The solidified yolk and white inside a hard-boiled egg spin together, reducing internal friction, allowing it to spin longer.)2. D. It will spin more slowly than the fresh egg.(Salted eggs have denser contents, which may affect the spinning differently than fresh or hard-boiled eggs.)3. A. It will spin like a fresh egg.(Because the water inside a balloon can move freely, similar to the liquid inside a fresh egg, causing similar spinning behavior.)4. B. shorter(Shorter vibrating objects produce higher-pitched sounds.)5. B. It will produce a sound.(A long pencil can vibrate and produce sound, though the pitch and loudness depend on its material and length.)
