All flashcards
Flashcard 1: Which option is the best observable property to compare if you need a see-through material: transparency or hardness?
Answer: Transparency. See-through materials must allow light to pass through.
Flashcard 2: Which option best compares materials using multiple properties: color only, or color and hardness?
Answer: Color and hardness. Using two properties gives more complete information.
Flashcard 3: Identify the better match for a raincoat: absorbent cotton or water-resistant plastic.
Answer: Water-resistant plastic. Plastic repels water, keeping you dry in rain.
Flashcard 4: Which material is the best electrical conductor: rubber, plastic, or copper?
Answer: Copper. Metals like copper have free electrons for current flow.
Flashcard 5: Which material is the best thermal insulator for a hot drink cup: foam or aluminum?
Answer: Foam. Foam traps air, which is a poor heat conductor.
Flashcard 6: Choose the best material for a window: transparent glass or opaque wood.
Answer: Transparent glass. Windows need transparency to let light through.
Flashcard 7: Identify the material most likely to be attracted to a magnet: iron, wood, or glass.
Answer: Iron. Iron contains magnetic domains that align with magnets.
Flashcard 8: Which conclusion is best if two samples look identical but one conducts electricity and one does not?
Answer: They are different materials with different properties. Appearance alone doesn't reveal all material properties.
Flashcard 9: Which option is the best observable property to compare if you need a scratch-resistant material: hardness or absorbency?
Answer: Hardness. Hard materials resist scratching and surface damage.
Flashcard 10: Identify the best observable property to compare for choosing a pot handle that stays cool: thermal conductivity or luster?
Answer: Thermal conductivity. Poor heat conductors keep handles cool during cooking.
Flashcard 11: Which option is the best observable property to compare for an electrical wire: electrical conductivity or texture?
Answer: Electrical conductivity. Wires need materials that allow electricity to flow.
Flashcard 12: Which option is the best observable property to compare if you need a material that soaks up water: absorbency or luster?
Answer: Absorbency. Absorbent materials have pores that trap water.
Flashcard 13: Identify the material most likely to be magnetic: plastic spoon, iron nail, glass marble.
Answer: Iron nail. Iron contains magnetic domains that align with magnets.
Flashcard 14: Identify the best material for a waterproof raincoat: cotton fabric, plastic sheet, paper towel.
Answer: Plastic sheet. Plastic repels water while fabric absorbs it.
Flashcard 15: Identify the best material for a sponge-like cleaner: wax paper, paper towel, aluminum foil.
Answer: Paper towel. Paper towels have fibers that trap liquids effectively.
Flashcard 16: Which option best describes a material that is transparent: clear glass, cardboard, brick?
Answer: Clear glass. Glass allows light to pass through completely.
Flashcard 17: Which option best matches a brittle material: rubber band, chalk, metal spoon?
Answer: Chalk. Chalk breaks easily when bent or dropped.
Flashcard 18: Which option is the best match for an opaque material: wax paper, clear plastic wrap, wood?
Answer: Wood. Wood blocks all light from passing through.
Flashcard 19: Which material is most absorbent: paper towel, plastic bag, glass marble?
Answer: Paper towel. Paper towels have fibers that trap water molecules.
Flashcard 20: Which option is the best match for a transparent material: clear glass, cardboard, aluminum foil?
Answer: Clear glass. Glass allows clear vision through it.