Plate Tectonics and the Rock Cycle

Which process is included in the formation of both metamorphic and sedimentary rocks?  

• Heating
• Recrystallization 
• Compaction
• Weathering

The formation of diamonds requires tremendous pressure that is generated

• in deep ocean trenches
• high in the mountains 
• in dry environments
• deep below the crust

In order for boulders to become sediments, the boulders must first be

• heated and melted
• weathered and eroded
• recrystallized
• buried

when a layer of sediment is deposited on the ocean floor, what is the next step in the formation of sedimentary rock

• heating
• burying
• eroding
• weathering

When buried sediments are subjected to pressure, the mineral grains are squeezed together. What is the result of this action? 

• volcanoes
• earthquakes
• new rock is formed
• layers rise to the surface

Two fossils of the same species were found on 2 diffrent contents. The continents are separated by the Atlantic Ocean. Scientists dated the fossils to be 2 millon years old. Which is the least likely explanation of r these findings. 

•  A great land bridge once connected the continents.
• The remains were carried by ocean currents.
• A single landmass once existed with both continents.
• The animals swam across the ocean.

Most sedimentary rock is made from sediments of other rock. Which of these processes would the sediments MOST likely go through to form sedimentary rock?

• compaction and cementation
• folding and recrystallization
• melting and solidifying
• heating and pressure

In the rock cycle, weathering and erosion begin the process of the formation of

• Sediments 
• Magma 
• Minerals
• Crystals 

The theory of Plate tectonics is based on

• Evidence of sea floor spreading 
• topographic mapping of mountain ranges.
• an analysis of soil at the plate boundaries.
• volcanic activity along coastlines.

The theory of continental drift states that the land masses called continents were once closer together and have drifted apart over time. Which circumstance is the strongest evidence in support of this
theory?

• the migration patterns of birds
• the periodic climate changes of Earth
• the large variety of animals on each continent
• the similarity of fossils on different continents