Plate Tectonics
Physics ⇒ Earth and Space Physics
Plate Tectonics starts at 7 and continues till grade 12.
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Describe how paleomagnetic evidence supports the theory of plate tectonics.
Describe the difference between oceanic and continental crust in terms of composition and density.
Describe the process that leads to the formation of a rift valley.
Describe what happens at a convergent plate boundary between an oceanic plate and a continental plate.
Explain how convection currents in the mantle contribute to the movement of tectonic plates.
Explain the process of sea-floor spreading.
Explain why earthquakes are common along plate boundaries.
A tectonic plate moves at an average rate of 5 cm per year. How far will it move in 2 million years?
At a transform boundary, plates move:
(1) Toward each other
(2) Away from each other
(3) Past each other horizontally
(4) Over each other vertically
Which of the following best describes the theory of plate tectonics?
(1) The Earth's crust is a single, unbroken shell.
(2) The Earth's crust is divided into several large and small plates that move over the mantle.
(3) The Earth's core is made of tectonic plates.
(4) The Earth's plates are stationary and do not move.
Which of the following best explains why volcanoes often form at subduction zones?
(1) The subducting plate melts and magma rises to the surface.
(2) Plates are moving apart, creating space for magma.
(3) Plates slide past each other, generating friction.
(4) The crust is too thick for magma to reach the surface.
Which of the following is a direct result of transform plate boundaries?
(1) Formation of new crust
(2) Subduction zones
(3) Earthquakes
(4) Volcanic arcs
Fill in the blank: The point on the Earth's surface directly above the focus of an earthquake is called the _______.
Fill in the blank: The process by which one tectonic plate is forced beneath another is called _______.
Fill in the blank: The slow movement of continents over the Earth's surface is called _______.
Fill in the blank: The supercontinent that existed about 250 million years ago is called _______.
True or False: Plate tectonics can explain the distribution of fossils and similar rock formations on different continents.
True or False: The Himalayas are still rising due to the collision of the Indian and Eurasian plates.
True or False: The movement of tectonic plates is measured in centimeters per year.
True or False: The movement of tectonic plates is responsible for the formation of mountains, earthquakes, and volcanoes.
