Earth is made of different layers that have varying characteristics. Which is the thickest layer?
The Mantle
100
The theory of plate tectonics is based on what?
Evidence of sea floor spreading
100
What causes tectonic plates to continually move?
Convection currents in the mantle
100
Define Weathering.
Mechanical or chemical surface processes that break rocks into smaller and smaller pieces.
100
The difference in density between the oceanic crust and the continental crust is the oceanic crust is?
More Dense than the continental crust.
200
Which Section of Earth is composed primarily of liquid metal?
The Outer Core
200
What conclusion can you make from the discovery of the same fossils on separate continents?
Modern land masses were once connected but moved apart.
200
What provides the best evidence that Earth's crust is divided in to tectonic plates?
Distribution of Earthquakes on Earth's surface.
200
Define Erosion.
Process in which surface materials are worn away and transported from one place to another by agents such as gravity, water, wind, and glaciers.
200
Earth is composed of layers of material with different properties. Which of the following is most likely to be in constant motion?
The Mantle
300
The inner core of Earth is solid because of what?
Amount of Pressure
300
How did the Theory of Plate Tectonics revolutionize scientific thought?
It explained the movement of oceanic and continental crusts.
300
The Surface of Earth is composed of large tectonic plates that are constantly shifting as they float on top of molten rock. Which process must occur in the mantle to make the plates move?
Convection currents
300
Define Deposition.
Dropping of sediments that occurs when an agent of erosion, such as gravity, a glacier, wind or water, loses its energy and can no longer carry its load.
300
Seafloor spreading occurs along certain boundaries in the ocean. Which are most likely to form at the boundary where the seafloor is spreading?
Mid-Ocean Ridges
400
The core of Earth is divided into two layers. The outer core is made of what?
molten iron and nickel
400
What does the theory of plate tectonics provide an explanation for?
The way in which the continents move.
400
Heath from inside of the Earth reaches the surface of the Earth similar to heating a .....?
Pot of Soup
400
Weathering turns mountains into what?
Rounded hills
400
Which crustal feature forms when two continental plates collide?
Mountain ranges
500
Why does the continental crust float on top of the mantle?
The continental crust is less dense than the mantle.
500
The United States is part of which tectonic plate?
North American Plate
500
How do tectonic plates move to from mountain ranges?
Convection currents in the mantle force two plates to collide.
500
Rivers and streams can carry sediments long distances before they are deposited. What is formed when sediments are deposited at the mouth of a river?
A Delta
500
Which event most likely takes place as a result of crustal movement along transform boundaries?