8th Grade 2nd Grading Period 2014-2015 Exam Study Guide
Due by December 12, 2014
Must be completed on loose leaf paper!!!!!
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What is an example of a mineral made up of a pure element?
What is the hardest known mineral?
How does the mineral Halite form?
When all the grains in a rock are large and easy to see, how is the rock described?
Which igneous rock has large crystals surrounded by smaller crystals?
What is deposition?
What is a conglomerate?
How does a metamorphic rock form?
What is streak?
What is the most common way a mineral breaks?
What is luster?
What is the softest mineral on the Moh’s hardness scale?
How is shale formed?
What are non foliated metamorphic rocks?
What is Wegener’s hypothesis of continental drift?
What is Pangaea?
What is a fossil?
What technology did scientists use in the mid 1900’s to map the mid-ocean ridge?
In seafloor spreading, where does molten material rise from the mantle and erupt at?
Why is old oceanic crust denser than new oceanic crust?
What do most geologists think is the cause behind the movement of Earth’s plates?
What is the theory of plate tectonics?
What is a transform boundary?
What is produced when a collision between 2 pieces of continental crust occurs at a divergent boundary?
How did scientists discover that rocks farther away from the mid-ocean ridge were older than those near it?
What did scientists in a submersible see when they observed the mid-ocean ridge?
Where are mid-ocean ridges found?
What is subduction?
What forms as a result of a divergent plate boundary?
What is a convergent plat boundary?
What gives rock its texture?
A mineral has a hardness of 6; will it scratch a mineral with a hardness of more or less than 6?
When magma cools fast, are the crystals large or small?
What is granite?
What are sediments?
If subduction occurs faster than oceanic crust can be created, what will happen to the ocean?
Is oceanic crust older or younger near the mid-ocean ridge? Farther away from the mid-ocean ridge?
What 3 piece of evidence did Alfred Wegener gather to support his theory of continental drift?
What form the largest mountain ranges on Earth?
What is a transform plate boundary?
What is cleavage?
What sedimentary rock is used in making cement?
What kind of texture does slate have? Why?
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What are extrusive igneous rocks?
What is compaction?
What are the 5 characteristics of minerals?
What is a crystal?
What is gold an example of that occurs in nature in a pure form?
Can you compare the densities of 2 minerals of the same size by hefting them?
What is luster?
What can cause a sedimentary rock change to metamorphic rock?
What step in the rock cycle creates the sediment from which sedimentary rock is formed?
In the rock cycle, what happens to magma and lava once they cool and harden?
What is a mid-ocean ridge?
What is a deep-ocean trench?
What is subduction?
What is a divergent plate boundary?
What is a convergent plate boundary?
Where are the plates found on Earth?
What is compaction?
How do sediments settle out of moving water?
What is erosion?
What are sediments?
What are foliated and non-foliated rocks?
What process continually adds new crust to the ocean floor along both sides of the mid-ocean ridge?
What kind of boundary is formed when a continental plate collides with an oceanic plate?
What is Pangaea?
Where does subduction occur?
What are 2 examples of non foliated metamorphic rocks?
What happens on land when continental plates pull apart at a divergent boundary?
What is the rock cycle?
What is continental drift?
What is broken into sections called plates, which float on top of the crust?
What is subduction?
What evidence did Alfred Wegner provide to support his hypothesis of continental drift?
Essays: The Essay questions are to be answered in complete sentences by Dec 12th. Theses essay questions will be
answered for the exam grade on Monday, December 15th!!!!
76. What does a mineral’s streak tell you, and how do you test for it?
77. How are rocks related to minerals? What is the difference in how rocks and minerals are classified?
78. Compare and contrast what occurs when 2 oceanic plates collide, when 2 continental plates collide, and when
an oceanic and a continental plate collide.
79. Cite evidence from a land form and fossil to support the hypothesis that Africa and South America were once
joined.
80. Describe how the shapes of present day continents support the theory of continental drift.