Semester review

A group of geology students found an unidentified rock weighing 15.5 grams during their field trip. To identify the rock, they decided to calculate its density. They measured the volume of the rock by submerging it in a cylinder filled with water. They then compared the calculated density with the density ranges provided in their geology textbook.

• Coal

• Dolomite

• Peridotite

• Sandstone

While on a mountain climbing expedition, John found an intriguing stone. He noticed that the stone could scratch his glass water bottle,

but not his steel pocket knife.

Based on the Mohs Hardness Scale, what can John infer about the stone?

• It is harder than quartz, but softer than topaz.

• It is harder than corundum, but softer than gypsum.

• It is harder than calcite, but softer than fluorite.

• It is harder than fluorite, but softer than quartz

A geologist found an irregularly shaped rock during his field trip. He decided to measure its density. He lowered the rock into a graduated cylinder which initially had a volume of water equal to 50 ml. After placing the rock, the water level rose to 75 ml. The rock's mass was found to be 250 g. What was the density of the rock?

• 15 g/mL

• 5 g/mL

• 10 g/mL

• 20 g/mL

• Metal

• Nonmetal

• Metalloid

A student tests an unknown substance that he or she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal?

• It is a good conductor of electricity

• It is very brittle and breaks easily

• It can easily float in water

• It is brown and dull.

Which of the following examples provides evidence of a PHYSICAL change?

• Wood is burned and releases ash and smoke

• Iron rusts over time

• When mixed, baking soda and vinegar form gas bubbles

• Boiling water bubbles when heated

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

• Streak and conductivity

• Hardness and luster

Which of the following examples provides evidence of a PHYSICAL change?

• Wood is burned and releases ash and smoke

• Iron rusts over time

• When mixed, baking soda and vinegar form gas bubbles

• Boiling water bubbles when heated

A student tests an unknown substance that he or she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal?

• It is a good conductor of electricity.

• It is very brittle and breaks easily.

• It can easily float in water.

• It is brown and dull

Which correctly identifies an advantage and a disadvantage of geothermal energy?

• Statement 1 is an advantage, and statement 2 is a disadvantage.

• Statement 2 is an advantage, and statement 3 is a disadvantage.

• Statement 3 is an advantage, and statement 4 is a disadvantage.

• .Statement 4 is an advantage, and statement 5 is a disadvantage.