Definitions
Reference Tables
Plate Tectonics
Volcanoes & Rocks
100
density
the amount of "stuff" in something OR mass / volume
100
Page 10: What is the inside layer of the Earth called?
inner core
100
Name one tectonic plate.
From page 5 of the Reference Tables: African, Antarctic, Arabian, Caribbean, Cocos, Eurasian, Fiji, Juan de Fuca, Indian-Australian, Nazca, North American, Pacific, Philippine, Sandwich, South American
100
Describe the eruption of a stratovolcano.
explosive; lots of smoke and ash
200
magma
melted rock UNDER the Earth's surface
200
Page 5: How is a CONVERGENT plate boundary shown on the map?
A black line with boxes on one side.
200
When all of the continents were together in one giant continent millions of years ago, what was it called?
Pangea
200
Describe the eruption of a shield volcano.
quiet; lots of runny lava
300
convergent
coming together
300
Page 5: What kind of plate boundary is the East Pacific Ridge?
divergent
300
What forms at CONVERGENT plate boundaries?
a trench
300
What are igneous rocks formed from?
lava or magma
400
divergent
spreading apart
400
Page 10: What is the DEPTH of the top of the STIFFER MANTLE?
about 500 km
400
What forms at DIVERGENT plate boundaries?
a ridge
400
If an igneous (volcanic rock) has large crystals, how fast did it cool?
slowly. (igneous rocks with no crystals cooled quickly.)
500
convection current
motion in the Earth's mantle that causes the tectonic plates to move
500
Page 10: What is the PRESSURE at the top of the OUTER CORE?
about 1.5 million atmospheres
500
Why do the tectonic plates move?
convection currents in the mantle (which is not solid) move the tectonic plates that make up the crust (which are solid)
500
Reference Tables, Rock Cycle in Earth's Crust diagram (pg. 6): What has to happen TO a rock for magma to form?
melting