Planet Earth: Grade 12 Science
A comprehensive worksheet for Grade 12 Science students covering key concepts related to Planet Earth, including its structure, processes, and systems.
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Planet Earth: Grade 12 Science
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Date:
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Read each question carefully and answer to the best of your ability. Show all work for calculations.
1. Which layer of Earth is primarily composed of molten iron and nickel?
Crust
Mantle
Outer Core
Inner Core
2. The process by which heat is transferred through the movement of fluids (like magma in the mantle) is called:
Conduction
Convection
Radiation
Subduction
1. The Earth's magnetic field is generated by the movement of liquid iron in the outer core.
True
False
2. The ozone layer is primarily found in the troposphere and protects Earth from harmful UV radiation.
True
False
1. The outermost rigid layer of Earth, including the crust and the uppermost mantle, is called the .
2. The continuous movement of water on, above, and below the surface of the Earth is known as the .
1. Briefly explain the theory of plate tectonics and its significance to Earth's geological processes.
2. Describe the composition and function of Earth's atmosphere, highlighting at least two major layers.