Sturcture of the Earth Flashcards
Earth
What are the four main layers of the Earth?
The crust, mantle, outer core, and inner core.
True or False: The Earth’s crust is the thickest layer of the Earth.
False.
Fill in the blank: The layer of the Earth that is solid and composed mainly of rock is called the __________.
crust.
Which layer of the Earth is liquid?
The outer core.
What is the primary composition of the Earth’s inner core?
Iron and nickel.
Multiple Choice: Which layer lies directly below the Earth’s crust?
A) Inner Core
B) Outer Core
C) Mantle
D) Lithosphere
C) Mantle.
What is the approximate thickness of the Earth’s crust?
5 to 70 kilometers.
True or False: The mantle is mostly solid but can flow slowly over time.
True.
What is the state of matter of the outer core?
Liquid.
Fill in the blank: The __________ is responsible for generating Earth’s magnetic field.
outer core.
What is the temperature range of the inner core?
Approximately 4,000 to 5,500 degrees Celsius.
Multiple Choice: Which layer of the Earth is involved in tectonic activity?
A) Inner Core
B) Outer Core
C) Mantle
D) Crust
C) Mantle.
What is the term for the rigid outer part of the Earth, consisting of the crust and upper mantle?
Lithosphere.
True or False: The mantle is thicker than the outer core.
True.
What role does the mantle play in plate tectonics?
It provides the convection currents that drive the movement of tectonic plates.
Fill in the blank: The Earth’s magnetic field is primarily generated by movements in the __________.
outer core.
What is the primary difference between the lithosphere and the asthenosphere?
The lithosphere is rigid, while the asthenosphere is semi-fluid and can flow.
Multiple Choice: Which layer contains the majority of Earth’s mass?
A) Crust
B) Mantle
C) Outer Core
D) Inner Core
B) Mantle.
What is the approximate depth of the mantle?
About 2,900 kilometers.
True or False: The inner core is solid due to the immense pressure despite high temperatures.
True.
What are the two main types of crust?
Continental crust and oceanic crust.
Fill in the blank: The outer core is primarily composed of __________ and __________.
liquid iron and nickel.
Multiple Choice: Which layer is the least dense?
A) Inner Core
B) Outer Core
C) Mantle
D) Crust
D) Crust.
What process causes the movement of tectonic plates?
Convection currents in the mantle.
True or False: The Earth’s layers vary significantly in composition and physical state.
True.
What is the primary characteristic of oceanic crust?
It is thinner and denser than continental crust.
