exercise (4)

• 1. Rocks vary in color, size, texture and shape. They are classified based on how they were formed. Which of the following deals with the study of rocks?

  • Petrology
• 2. Halite is made when a body of seawater becomes closed off and evaporates and salt precipitates out and is deposited as crystallized halite. What type of sedimentary rock is formed?

  • Chemical
• 3. Igneous rock is divided into two groups, extrusive and intrusive. Extrusive igneous rocks form when magma makes its way to its surface as lava and then cools, forming rocks. Which will be the characteristics of the crystals?

  • Crystals are fine grained.
• 4. Regional metamorphism occurs due to changes in pressure and temperature over a large region of the crust. It may happen when rock is buried deep below the surface or where pieces of the Earth’s crust collide. Which is a metamorphic rock?

  • Marble
• 5. Igneous and metamorphic rock can be buried and undergo tremendous heating and stress. What is the process of transformation of one rock type into another?

  • Metamorphism
• 6. What type of rocks are formed from sediments over long period of time?

  • Sedimentary Rocks
• 7. This refers to type of rock that was heated and compressed over time

  • Metamorphic
• 8. What is the natural process that causes one kind of rock to change into another kind?

  • Metamorphism
• 9. A rock that forms when magma hardens beneath Earth’s surface is termed as:

  Intrusive igneous rock
• 10. Which of the following is an example of an igneous rock?

  Granite
• 11.Which of the following represents the correct order of the processes responsible for the formation of sedimentary rocks?

  • Weathering, erosion, deposition, compaction, cementation
• 12. A student obtained a cup of quartz sand from a beach. A saltwater solution is poured into the sand and allowed to evaporate. The mineral residue from salt water solution bonds the sand grains together, forming a material that is most likely an:

  • sedimentary rock
• 13. Which of the following is true about rocks?

  Most rocks are a mixture of minerals
• 14. What is the type of rock formed from lava that cools quickly that results to finer grain and smaller size of crystals?

  • Extrusive igneous rock
• 15. Fossils are found on this type of rocks.

  Sedimentary rock