Cave Formations
Water dripping from the ceiling of a cave sometimes falls to the floor and evaporates there, depositing a steep mount or spike of calcium carbonate on the floor.
Stalagmite
rarest and most beautiful gems
precious stones
Any hollow space in the earths crust that has formed naturally and is large enough for a person to enter
cave
Th area surrounding a magnet in which the force of the magnet affects other objects
magnetic field
Any rock containing a metal together with impurities
Ore
column
small deposits of igneous and metamorphic crystals
gemstones
Any trace of a plant or animal left in a rock
fossil
The ends of a magnet
poles
The hardest material that composes the earth's crust is called
rock
Thin hollow tubes that hang from the ceiling of many caves.
Soda Straws
the hardest known mineral found in "pipes"
diamond
Over 75% of the earth's surface is covered with _____ rock.
sedimentary
The magnetic field produced by the earth
magnetosphere
When molten rock solidifies, it forms ____ rock.
igneous
thicker icicle-shaped formation
stalactite
the most commonly used practical metal; used for thousands of years to make tools.
iron
What type of igneous rock is formed at the earth's surface, cools rapidly and has a fine-grained appearance
extrusive
Which sedimentary rock is formed by chemical sediments and is used for salting roads and flavoring food
halite
Sand and mineral fragments that have been pressed together to form _____ rock.
sedimentary
calcium carbonate particles become attached to a grain of sand in the pools, layers continue building up around the grain of sand. It is in constant motion, so it will not stick to the side of the pool.
cave pearls
a metal that is a good conductor of electricity; two of its alloys are brass and bronze
copper
What type of igneous rock remains IN a pocket below the surface, cools slowly, and has coarse-grained appearance.
INtrusive
What type of metamorphic rock is made up of layers like the leaves of a book?
foliated
Rock that has been changed by extreme heat or pressure into a new kind of rock is known as ____ rock.
metamorphic