Unit 2 Properties of Matter Unit 2 Oral Assessment

1 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? A Streak and hardness B Luster and conductivity C Streak and conductivity D Hardness and luster

2 A student measured the mass and volume of a metal sample using a triple beam balance and a graduated cylinder. The sample has a mass of 16.7 grams and a volume of 4.4 cm 3. What is the density of the metal sample? Record your answer and fill in the bubbles on your answer document. Be sure to use the correct place value.

3 How the surface of a mineral appears when it reflects light is known as ― A streak B luster C conductivity D hardness

4 The capability of a substance to be molded and shaped, or hammered into sheets without breaking is known as — F ductility G conductivity H malleability J luster

5 The capability of a substance to be stretched into thin wires without breaking is known as — A malleability B conductivity C luster D ductility

6 The ability of one mineral to scratch another mineral is determined by the mineral’s — F luster G streak H color J hardness

7 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 nonmetal B metalloid C metal D semi-conductor

8 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 — F nonmetal G metalloid H metal J semi-conductor

9 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? A Nonmetal B Metalloid C Metal D Semi-conductor

10 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? F 0.4 g/cm 3 G 2.25 g/cm 3 H 4.0 g/cm 3 J 36 g/cm 3

11 A student decided to find the density of her house key to try and identify the type of metal from which it is made. She found the volume of the key to be 5 ml and the mass to be 39.5 g. Using the chart above, from which type of metal is the key made? A Aluminum B Steel C Copper D Gold Type of Metal Density (g/cm 3 ) Aluminum2.70 Brass8.40 Copper8.90 Gold19.30 Iron7.80 Lead11.30 Nickel8.80 Steel7.90

12 The volume of an unknown liquid is shown in the graduated cylinder. The mass of the liquid is 105 grams. What is the density of the unknown liquid? F 3500 g/mL G 0.33 g/mL H 3.0 g/mL J 3.3 g/mL

13 A student is testing a silver rock sample with the lab equipment shown in the diagram above. The silver rock completes the circuit and lights the bulb. The student concludes the sample could be which of the following? I. metal II. metalloid III. nonmetal A I B I, II C I, II, III D II, III

14 How would you classify sample 3 on the table above? F Metal G Nonmetal H Metalloid J Compound Sample Appearance Conductor Malleable / Ductile Brittle 1 Yellowish, dull, solid No Yes 2Silvery solidMaybe No 3Silvery liquidYesNo

15 When metals, nonmetals, and metalloids are compared according to luster, which is the best description of the appearance of metalloids? A Dull B Powdery C Shiny D Either shiny or dull

16 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? F Nonmetals are poor conductors of heat and electricity. G Metals are good conductors of heat and electricity. H Nonmetals are good insulators of heat and electricity. J Metalloids are semiconductors of electricity.

17 Which two physical properties of minerals can be observed by scratching the mineral against other substances? A color and streak B luster and streak C streak and hardness D hardness and luster

18 What is the density of the rock sample shown in the illustration above? F 0.2 g/cm 3 G 40 g/cm 3 H 5.0 g/cm 3 J 1.43 g/cm 3