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Metals, Density, and hardness
Terms in this set (31)
How the surface of a mineral appears when it reflects light is known as ―
A student needs to find the density of a cube. Each side of the cube measures 3 cm and the mass of the cube is 12 g. What is the approximate density of the cube?
A student is examining an object in science class. It is solid, does not conduct, malleable but not ductile, and is a shiny silver color. The sample is most likely a —
A student is examining an object in science class. It is a pale yellow, brittle solid, with no shine. The sample is most likely a —
An electric company is designing a new cell phone. They need a solid material that conducts electricity and can be made into a thin wire. Which material would best fit their needs?
streak and hardness
A student is testing several minerals in science class. First, he scratched the minerals across a tile, and then he scratched the minerals with a copper penny and a steel tool. What physical properties is the student testing?
Streak and conductivity
A student is implementing an investigation of physical properties using samples of metals, nonmetals, and metalloids. She used a battery, wires, and a bulb to test if each of the samples will complete the circuit causing the bulb to light. Next, she shined a bright light on each of the samples. Which physical properties is the student investigating?
The mineral can scratch Apatite and every mineral with a hardness scale number lower than 7.
Which of the following is a correct statement about a mineral with a hardness rating of 7?
The capability of a substance to be molded and shaped, or hammered into sheets without breaking is known as —
The capability of a substance to be stretched into thin wires without breaking is known as —
high conductivity, high malleability, and high luster
Copper is a common metal. Which of the following properties does this metal most likely have?
The ability of one mineral to scratch another mineral is determined by the minerals-
Either shiny or dull
When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids?
Metals are good conductors of heat and electricity.
Cooking pans are often made of aluminum or copper. Electrical wires made of aluminum and copper are also found in homes.
Why are these materials good choices for cooking and electricity?
brittle, dull, insulator
Which of the following lists of properties best describes nonmetals?
• Physical Property
Measurable characteristics that describe the physical state of something, including mass, magnetism, temperature, density, shape, volume, and conductivity.
• Chemical Properties
Are properties that can be measured or observed only when matter undergoes a change to become something new.
A material that does not conduct heat or electrical current.
A substance that shows the property of electrical conductivity between that of a conductor and that of an insulator; the foundation of modern electronics.
Sort or put into groups based on similar and dissimilar physical, chemical, or biological characteristics.
Matter that does not contain carbon.
• Moh's Hardness Scale
A set of ten minerals used as a standard of hardness against which an unknown mineral's hardness is compared.
A measure of scratch resistance of various minerals; when the ability of harder minerals to scratch softer minerals is used for identification.
A naturally formed, inorganic solid that has a specific chemical formula and repeating three-dimensional structure.
mass over volume
A measure of the space that matter occupies.
A procedure used to measure volume of a solid object by placing it in a known amount of liquid.
final amount - starting amount
Formula for volume
length x width x height
the number of atoms an object contains.
Formula for mass
density x volume
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