Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
What does the" Theory of Plate Tectonics" state?
|
The theory that earths lithosphere are in constant motion , driven by convection currents in the mantle.
|
|
|
What is the name of main scientist that developed the theory of plate tectonics?
|
Alfred Wagner
|
|
|
What are the Layer of the earth called?
|
Crust Mantle Outer core Core |
|
|
How does the surface of the earth change when two continental plates collide?
|
When the two continental plates collide they form mountain ranges. The more dense plate sinks under the other this is called subduction.
|
|
|
What is formed when an oceanic plate slides under a continental plate?
|
Subduction occurs and volcanoes can possibly form.
|
|
|
What properties can be observed to classify rocks as igneous ( ig-ne-us), metamorphic, or sedimentary?
|
Grain size Grain shape Grain pattern |
|
|
How are Igneous rocks that are smooth and glassy formed?
|
They are formed by rapid cooling without forming of crystals.
|
|
|
How are Igneous rocks that have grains formed?
|
Slowly cooling magma with formation of small crystal structures.
|
|
|
The plates of the Earth's crust move because of ___________ current happening in the ___________ of the Earth? |
Convection and Mantle.
|
|
|
Describe the composition and properties (liquid or solid, temperature, made out of ) of each layer of Earth. Crust |
Crust is solid dry and liquid land formed by rock.
|
|
|
Mantle
|
Solid hot layer of rock. Lithosphere upper part very similar to the crust Asthenosphere is the softer lower layer of the mantle ex: soft bends like plastic or warm asphalt. |
|
|
Outer core
|
A layer of liquid molten metal that surrounds the inner mostly made of iron and nickel.
|
|
|
Inner core?
|
Dense ball of solid metal with extreme pressure the atoms cannot escape and become a liquid.
|
|
|
What scale do scientist use to measure earthquakes. What instruments do they use to measure earthquakes?
|
The commonly used methods of measuring earthquakes are the Mercalli scale, the Richter scale, and the moment magnitude scale. The seismic waves are measured by a seismograph.
|
|
|
What is the name of the scientist that developed the theory of continental drift?
|
Alfred Wegner proposed that the continents were compressed into one large continent and over time they have all drifted apart to current location.
|
|
|
What are the 3 pieces of evidence that support the theory of continental drift.
|
Climate, Fossils and land features.
|
|
|
Was the theory of Continental drift accepted while the Wegner was alive? Why or why not.
|
They were not accepted because of lack of data to support his theory.
|
|
|
Why do we see different phases of the moon from Earth?
|
Because of the way the sun reflects off the moon.
|
