Hard Minerals Reading and Quiz

According to the passage, why do gems vary in color?

• The sun changes the gems' colors.

• They are dyed different colors.

• They are formed from different materials.

• Heat changes the color of the gems.

According to the description in the passage, what is the highest temperature the mantle can reach?

• 2,006 degrees Fahrenheit

• 480 degrees Fahrenheit

• 4,000 degrees Celsius

• 4,000 degrees Fahrenheit

Based on the passage, which of the following most likely makes a gem valuable?

• how hard the gem is

• what color the gem is

• how rare the gem is

• how much carbon is in the gem

Read the following sentence and answer the question below: "Black diamonds are a rare kind of diamond with mysterious origins." As used in the sentence, rare describes

• where to find diamonds

• how to determine the value of a diamond

• something that is uncommon

• something that can be found everywhere

The central idea of the passage is

• where to find diamonds

• how to determine the value of a diamond

• how diamonds are formed

• how pencils are made

What transforms carbon into diamonds?

• Heat and pressure

• Water and minerals

• Sunlight and soil

• Ice and snow

The question below is an incomplete sentence. Choose the word that best completes the sentence. __________ graphite and diamonds are both made from carbon, graphite is much softer than diamonds.

• So

• Although

• Because

• Then

Which image shows something that is probably valuable?

• The calendar

• The gold ring

• Both are equally valuable

• Neither is valuable