Science Unit 2 review

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?

• Streak and hardness

• Luster and conductivity

• Color and state

• pH and fracture

Copper is a common metal. Which of the following properties does this metal most likely have?

• Low conductivity, low malleability, and low luster

• High conductivity, high malleability, and low luster

  
  

• Low conductivity, high malleability, and high luster

  
  

• High conductivity, high malleability, and high luster

  
  

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

• Nonmetal

• Metalloid

• Metal

• Semi-conductor

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 —

• Nonmetal

• metalloid

• metal

• semiconductor

A 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?

• Nonmetal

• Metalloid

• Metal

• Semi-conductor

Tags

NGSS.MS-ETS1-1

How would you classify sample 3 on the table above?

• metal

• nonmetal

• metalloid

• compound

Students tested four materials by hitting each sample with a hammer to compare them for malleability. The table below shows the results of their tests.

Which sample is most likely a nonmetal?

• a

• b

• c

• d

When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids?

• Shiny

• Dull

• Either shiny or dull

• Powdery

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?

• Nonmetals are poor conductors of heat and electricity.

• Metals are good conductors of heat and electricity.

• Nonmetals are good insulators of heat and electricity.

• Metalloids are semiconductors of electricity.

Tags

NGSS.MS-PS2-3

Which of the following lists of properties best describes nonmetals?

• Brittle, shiny, conductor

• Malleable, shiny, conductor

• Brittle, dull, insulator

• Malleable, dull, insulator