All flashcards
Flashcard 1: What is density?
Answer: Mass per unit volume. How tightly packed matter is in a given space.
Flashcard 2: Which tool is best for measuring the volume of a liquid sample?
Answer: Graduated cylinder. Narrow shape and markings ensure accurate readings.
Flashcard 3: Which tool is best for measuring mass in a classroom investigation?
Answer: Balance (triple-beam or digital). Measures in grams with precision.
Flashcard 4: What physical property describes how easily a material can be hammered into a thin sheet?
Answer: Malleability. Gold and aluminum are malleable; ceramics are not.
Flashcard 5: What physical property describes how easily a material can be pulled into a wire?
Answer: Ductility. Metals like copper are ductile; glass is not.
Flashcard 6: Identify the physical property that describes resistance to scratching (for example, a nail test).
Answer: Hardness. Harder materials scratch softer ones.
Flashcard 7: Identify the property tested when you check whether a material can be bent without breaking.
Answer: Flexibility. Flexible materials bend; brittle ones break.
Flashcard 8: What is the formula for density using mass m and volume V?
Answer: D=Vm. Divide mass by volume to find density.
Flashcard 9: Calculate density for m=30 g and V=10 mL using D=Vm.
Answer: 3 g/mL. D=1030=3 g/mL.
Flashcard 10: Identify the correct conclusion: An object floats in water. Is its density less than, equal to, or greater than water?
Answer: Less than water. Objects float when density < 1 g/mL (water's density).
Flashcard 11: Which word describes a material that does not let light pass through?
Answer: Opaque. Blocks all light, like wood or metal.
Flashcard 12: Which word describes a material that lets some light through but blurs images?
Answer: Translucent. Like frosted glass or wax paper.
Flashcard 13: Which word describes a material that lets most light pass through clearly?
Answer: Transparent. Like clear glass or clean water.
Flashcard 14: What physical property describes whether light passes through a material?
Answer: Transparency (transparent, translucent, or opaque). Materials interact with light in these three distinct ways.
Flashcard 15: What physical property describes how rough or smooth a surface feels?
Answer: Texture. Detected by touch, ranging from bumpy to silky.
Flashcard 16: What physical property describes how shiny or dull a material looks?
Answer: Luster. Describes the way light reflects off a surface.
Flashcard 17: What is the difference between a physical property and a chemical property?
Answer: Physical: no new substance; chemical: forms new substances. Physical changes are reversible; chemical changes create different materials.
Flashcard 18: Which physical property describes how hard it is to scratch a material?
Answer: Hardness. Diamond is very hard; chalk is soft.
Flashcard 19: What term describes a material that lets some light through but not clearly?
Answer: Translucent. Like frosted glass that blurs what's behind it.
Flashcard 20: Which physical property describes whether a material lets light pass through clearly?
Answer: Transparency. Like glass or clear plastic that you can see through.
Flashcard 21: Which material property explains that a steel paper clip is attracted to a magnet?
Answer: Magnetism. Steel contains iron, which is magnetic.
Flashcard 22: What physical property describes whether a material can be hammered into a thin sheet?
Answer: Malleability. Metals like gold and aluminum show this property.
Flashcard 23: What physical property describes the amount of matter in an object?
Answer: Mass. Measured in grams or kilograms.
Flashcard 24: Identify the density when mass is 12g and volume is 3mL.
Answer: 4mLg. Apply D=Vm: 3mL12g=4mLg.
Flashcard 25: Identify the volume when mass is 20g and density is 5mLg.
Answer: 4mL. Rearrange to V=Dm: 5mLg20g=4mL.
Flashcard 26: Which term best describes a material that lets some light through but blurs images?
Answer: Translucent. Like frosted glass or thin paper.
Flashcard 27: What physical property describes how much space an object takes up?
Answer: Volume. Measured in cubic units like cm3 or mL.
Flashcard 28: Which physical property describes whether a material can be bent without breaking?
Answer: Flexibility. Rubber bands bend; glass rods break.
Flashcard 29: Which physical property describes a material that breaks or shatters easily?
Answer: Brittleness. Glass and ceramics are brittle materials.
Flashcard 30: What physical property describes how shiny a material is?
Answer: Luster. Metals typically have high luster.