Rocks and Minerals

1. Which of the following best defines a rock in geology?

• A. A single mineral with unique properties
  
  
  

• B. A man-made object composed of minerals

• C. A naturally occurring aggregate of one or more minerals

• D. A liquid mass of mineral particles

2. What are the three main types of rocks?

• A. Quartz, feldspar, mica

• 
  B. Igneous, metamorphic, sedimentary
  
  

• C. Basalt, granite, limestone

• D. Magma, lava, crystal

3. Which of the following minerals is the hardest among common minerals?

• A. Mica

• 
  B. Quartz
  
  
  

• C. Feldspar

• D. Calcite

4. Granite is best classified as which type of rock?

• A. Sedimentary

• B. Metamorphic

• C. Igneous
  

• D. Volcanic

5.** Which mineral is known to split into very thin sheets?

• A. Quartz

• B. Feldspar

• C. Hornblende

• 
  
  
  D. Mica

6. What is the primary chemical component of quartz?

• C. Silicon oxide

• B. Aluminum silicate

• C. Silicon oxide

• D. Magnesium carbonate

7.The rock that forms the ocean floor is mainly:

**

• A. Granite

• 
  B. Basalt
  

• C. Limestone
  

• D. Marble

8. What causes metamorphic rocks to form?

• A. Evaporation of water

• B. Cooling of lava

• 
  
  C. Heat, pressure, or chemical fluids
  

• D. Crystallization of minerals in magma

9. Which of these is a clastic sedimentary rock made of sand-sized particles?
                                                             

• A. Sandstone

•   B. Siltstone    

• C. Shale   

• D. Conglomerate

10. Which of these rocks forms from biological material in shallow seas?

• A. Granite

• B. Basalt

• 
  
  C. Limestone
  

• D. Obsidian