Ages 9–11🔬 Science11 verified questions on this shelf
Advanced Material Properties
Compare and group everyday materials based on advanced properties: hardness, solubility, transparency, electrical and thermal conductivity, and response to magnets
Try three questions
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Question 1 of 3
A student measures a solid object and records the following observations: mass = 120 g, volume = 20 cm³, the object is attracted to a magnet, and a circuit tester shows that it conducts electricity. Which material best matches these observations?
Question 2 of 3
A scientist places an unknown solid in a container of water and observes that it sinks. She then tests whether a magnet attracts the solid and finds that it is not attracted. She also notes that the solid feels cold to the touch. Which material is the unknown most likely to be?
Question 3 of 3
Maya has four mystery pieces labeled W, X, Y, and Z. She runs four simple tests on each piece: 1. Hardness test – She tries to scratch each piece with her fingernail. If the piece scratches the nail, it is harder than the nail. 2. Solubility test – She drops a tiny bit of each piece into a cup of water and stirs. If the bit disappears, the material is soluble; if it stays the same, it is insoluble. 3. Electrical test – She places each piece in a simple circuit with a battery and an LED. If the LED lights, the material conducts electricity. 4. Magnet test – She holds a small bar magnet near each piece. If the piece moves toward the magnet, it is magnetic. Maya’s observations are: - W: scratches the nail, does not dissolve, LED lights, not attracted to magnet. - X: does not scratch the nail, dissolves, LED does not light, attracted to magnet. - Y: scratches the nail, does not dissolve, LED does not light, not attracted to magnet. - Z: does not scratch the nail, does not dissolve, LED lights, attracted to magnet. Which sample would be the best choice for a kitchen spatula that must be (1) harder than a fingernail, (2) insoluble in water, (3) a non‑conductor of electricity, and (4) not attracted to a magnet?
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