Magnet
The 2 ends of a magnet
Poles
the study of caves
Speleology
rocks that form when molten rock solidifies
igneous rock
small deposits of igneous & metamorphic crystals are called what?
petroleum in its natural form
crude oil
The magnetic field that is produced in the earth
magnetosphere
Is the process of a cave forming physical or chemical weathering?
Chemical
most common igneous rock and can be found everywhere on land
Granite
the rarest, most durable & beautiful gems
precious stones
most expensive type of coal to mine; hard, shiny, black coal
Anthracite
The area surrounding a magnet in which the force of the magnet affects other objects
Magnetic Field
What type of rock do most caves form in?
Limestone
igneous rock that remains in a pocket below the surface, cools slowly and has a coarse-grained appearance
Intrusive
hardest known mineral, found in “pipes”
diamond
the most common type of coal; “soft coal”
Bituminous
Stream of harmful particles is called what?
solar wind
How is a cave formed?
1. Rainwater in cracks,
2. Acidic water dissolves limestone & makes cracks bigger,
3. Water recedes leaving a cave
type of metamorphic rock made up of layers like the leaves of a book
foliated rock
most commonly used practical metal, used to make tools
iron
poorest quality coal; “brown coal”
Lignite
Where does the earth's magnetic field come from?
Currents of electricity that circulate in the earth’s outer core. That current flows through an object and produces a magnetic field around the object. The earth remains “magnetized” because of the unceasing electric currents deep within its core.
Troglophiles
cave lovers; animals that live in or above a cave
igneous rock formed at the earth’s surface, cool’s rapidly, and has a fine-grained appearance
extrusive rock
a metal that is a good conductor of electricity; 2 of its alloys are brass and bronze
copper
cave formed by the dissolving of underground rocks
Solution Cave