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Science (Gr 6) Earth's Layers Part 2
on 8 Nov 12, enabled by
(62% of success)
27 questions - 2 417 players
Layers of the earth
The layer of hot solid material between the crust and the core.
The layer of rock that forms the Earth's outer skin.
Geologists often group the crust and uppermost mantle into a single layer called the ________.
This is a very soft layer found below the lithosphere.
These currents make the lithosphere move.
Sea floor spreading currents
This is a very hot area found below the asthenosphere.
The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle again.
The Earth's lithosphere is a solid outer shell broken into pieces separated by cracks.
Shaking and trembling that results from movement of rock beneath the Earth's surface.
The Earth's plates are in slow constant motion driven by convection currents in the mantle.
Plate subduction theory
Plate tectonic theory
Seismic wave theory
Vibrations that are similar to sound waves.
The mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively.
What are p or primary waves?
Molten lava waves
First earthquake waves
________ forms from fast-moving hot lava that is thin and runny.
Aa froms from lava that is _______, ________, and ________.
Hotter, thinner, and faster.
Cooler, thicker, and slower.
Hotter, thicker, and slower.
What is the definition of pyroclastic flow?
A mix of oxygen and silicon that forms magma that flows down the sides of a volcano.
Hot gases, ashes, cinders that flow down the sides of a volcano
Fast moving hot lava that is thin and runny.
What are the two types of volcanic eruptions?
Silent and deadly
Quiet and explosive
Quiet and violent
When a volcano erupts, the force of _________ gases pushes _____ from the magma chamber through the pipe until it flows or explodes out of the vent.
Molten rock and gas leave the volcano through an opening called a _____.
A bowl shaped area that may form at the top of a volcano around the central vent.
When earthquakes occur they produce ______.
The 3 main layers of the Earth are the crust, mantle, and core. These layers vary greatly in size, composition, temperature, and pressure.
The crust is a layer of solid rock that includes both dry land and the ocean floor.
This type of rock is dark, fine-grained rock (oceanic crust).
This type of rock is light in color and has course grains (continental crust).
This layer is referred to as being able to bend like a metal spoon even though it is solid.
Who proposed the continental drift theory which stated the continents slowly moved across the Earth's surface?
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