Show:
Earth's Structure
Earthquakes & Volcanoes
Rocks
Hidden Treasures
Caves and Magnets
100
the outermost layer of the earth
What is the crust?
100
any trembling or shaking of the earth's crust
What is an earthquake?
100

rock that forms from sediments that have been pressed together into solid rock

What is sedimentary rock?
100
the hardest of all known minerals
What is diamond?
100
large caves form in this sedimentary rock
What is limestone?
200
the middle layer of the earth
What is the mantle?
200
melted rock
What is magma?
200
rock that forms when molten rock solidifies
What is igneous rock?
200
the most commonly used metal
What is iron?
200
the two ends of a magnet
What are poles?
300
the study of the earth and its structure
What is geology?
300
the place at ground level that is directly above the focus of an earthquake
What is the epicenter?
300
any trace left in rock by a plant or animal
What is a fossil?
300
the rarest, most durable and beautiful gems
What are precious stones?
300
the area surrounding a magnet
What is the magnetic field?
400

pieces of the earth's crust that "float" like rafts on the soft rock of the upper mantle

What are plates?
400
the study of earthquakes
What is seismology?
400
the most beautiful and widely used metamorphic rock that was once limestone
What is marble?
400
a rock containing a metal together with impurities
What is ore?
400
the scientific study of caves
What is speleology?
500
the boundary between the crust and the mantle
What is the Moho?
500
the volcano that produces a large amount of fluid lava that surges from the volcano's vent like water from a fountain
What is a Hawaiian volcano?
500
rocks made up of layers like the leaves (pages) of a book
What is foliated rock?
500
hard, shiny, black coal
What is anthracite?
500
animals that live their entire lives in caves
What are troglophiles?