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Transcript
Unit D Test Review
Howard Middle School
6th Grade
Earth Science
Test Review
• Scientific evidence suggests that the earth
is billions of years old.
• Continental drift is the idea that the
continents were once joined together to
form a large land mass.
• Plate tectonics helps explain the formation
of mountains.
Test Review
• The Himalayan mountains, which are
along the northern border of India, were
formed by the collision of two lithospheric
plates.
• The distance from the earth’s surface to
the center of the earth is 6,000 km.
• New lithosphere is mostly created at a
divergent plate boundary.
Test Review
• The word “lithosphere” is used to refer to
the crust and the upper mantle.
• Earthquakes are most likely to occur at a
transform boundary.
• Plate tectonics refers to the theory that the
surface of the earth is made up of large
plates that have moved over time.
Test Review
• Which of the following statements is
TRUE?
– The earth’s crust moves around but is never
destroyed.
– New crust is always forming on the top of
large mountains.
– Old crust falls into the oceans and is
destroyed over time.
– Old crust is destroyed and new crust is
formed over time.
Test Review
• Which of the following statements provides
evidence for plate tectonics?
– The same kind of unusual fossils are found in
South America and Africa.
– The same kind of unusual rock layers are
found in North America, Europe, and Africa.
– The earth’s continents are moving at a rate of
centimeters per year.
Test Review
• Plate tectonics is the theory that sections
of the earth’s crust have moved toward
and away from each other to form
continents, mountains, and oceans.
Short Answer
• Modern humans have been on the earth
for 195,000 years. Select three major
events that occurred before that time and
describe the order in which they occurred.
• In your own words, explain:
– The theory of plate tectonics
– How earthquakes, volcanoes, and mountain
formation are related to plate tectonics.
• Be as specific as you can.
Short Answer
• What is subduction?
• At what type of plate boundary does
subduction occur?
• Do you think nuclear waste should be
stored in a subduction zone? Support
your answer with at least two pieces of
evidence.