grade 6 science test 6
Terms
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- What is the hardest known mineral? (found in pipes)
- diamond
- What is any hollow space in the earth's crust that has formed maturally and is large enough for a person to enter.
- cave
- What are small deposits of igneous and metamorphic crystals?
- gemstones
- What is any trace of a plant or animal left in a rock?
- fossil
- Name for the rarest, most durable and beautiful gems
- precious stones
- What is a rock containing a metal together with impurities?
- an ore
- Name the metal that is a good conductor of electricity; two of its alloys are brass and bronze.
- copper
- the most commonly used practical metal; used for thousands of years to make tools
- iron
- area surrounding a magnet in which the force of the magnet affects other objects
- magnetic field
- The ends of a magnet are called _____.
- poles
- What kind of rock covers over 75% of the earth's surface?
- sedimentary
- magnetic field produced by the earth is called
- magnetosphere
- The hardest material that composes the earth's crust is ____.
- rock
- What kind of rock has been changed by extreme heat or pressure into a new kind of rock?
- metamorphic
- Which kind of rock is formed from sand and mineral fragments that have been pressed together?
- sedimentary
- Which rock is formed when molten rock solidifies?
- igneous
- type of igneous rock formed at the earth's surface, cools rapidly, and has a fine-grained texture
- extrusive
- most common igneous rock and can be found everywhere on land
- granite
- type of igneous rock remains in a pocket bylow the surface, cools slowly, and has a coarse-grained texture
- intrusive
- Which sedimentary rock is formed by chemical sediments and is used for salting roads and flavoring food?
- halite
- sedimentary rock used to make glass
- sandstone
- sedimentaruy rock that is the only stone formed by living animals
- reef limestone
- metamorphic rock that begins as shale, is very hard, and has leaflike layers
- slate
- metamorphic rock that is perhaps one of the most beautiful and most widely used, and began as limestone
- marble
- What is designed to live either in or above a cave?
- troglophile
- The study of caves is _____.
- speleology
- What visits a cave regularly but must return to the surface for food?
- trogloxene
- What is formed by the dissolving of underground rocks by water?
- solution cave
- Excplain how a solution cave is formed. Be able to tell if this physical or chemical weathering and why?
- See text p.
- hard, shiny, black coal
- anthracite
- visits a cave regularly but must return to the surface for food
- trogloxene
- formed by the dissolving of underground rocks by water
- solution cave
- What consists of rounded pebbles in hardened clay or sand?
- conglomerate rock
- most common type of coal
- bitumious
- poorest quality of coal
- lignite
- thick, dark, flammable liquid
- petroleum