Abeka Investigating God's World Ch 4
gem
a cut and polished stone
aluminum
a lightweight, silvery-colored non-magnetic rustproof metal
natural resource
a material helpful to man which is found in or on the earth
graphite
a material used in pencils instead of lead
spelunker
a person who explores a cave
uranium
a radioactive metal that is the primary source of nuclear power
gemstone
a rare and beautiful mineral that has not been polished
sandstone
a rock that is made of sand
shale
a rock that smells like mud when it gets wet
geode
a rocklike object which looks like a mud-ball and contains crystals inside
paleontologist
a scientist who studies fossils
geologist
a scientist who studies the structure of the earth
crystals
a solid having a definite shape with flat surfaces and sharp edges. A special kind of solid formed by all minerals.
pumice
an igneous rock that floats
gold
bright yellow metal that can be hammered into thin sheets
humus
decaying plant and animal material found in the earth's soil
limestone
formed from bones and seashells, most caves are found in this rock
igneous rock
granite, pumice, obsidian
stalagmite
grows up from the ground
stalactite
holds on tightly to the ceiling
granite
igneous rock made of several different types and colors of minerals found deep below the land's surface
sedimentary rock
limestone, sandstone, shale
obsidian
looks like clear, black glass. also called volcanic glass
soil
loose earth containing humus and tiny pieces of weathered rock
crude oil or petroleum
oil in it's natural state
petrified fossils
plant and animal remains that have turned to stone
fossils
preserved remains of plants and animals
metamorphic
slate, marble
shale
smells like mud
ice, tar, amber
substances in which whole animals have been preserved
silver
the best conductor of electricity and the first metal mentioned in the Bible
copper
the best low cost electrical conductor available used to make electrical wiring, and as a coating on pennies
amber
the hardened sap in which some insects have been preserved
diamond
the hardest of all substances
iron
the most useful metal
mercury
the only metal that is liquid at room temperature
ruby
the rarest gemstone
sedimentary
the type of rock in which most fossils are found
chemical and physical
two types of weathering
conservation
using natural resources wisely
marble
was once limestone
impurities found in it
what gives quartz it's color?
geyser
what is the name for a spring of hot water that spurts from the earth?
Old Faithful
A famous geyser in Yellowstone National Park
mold fossils
A fossil formed when the mud that buries a plant or animal quickly hardens around it
acid in rainwater dissolves some of the rock, especially limestone, underground
How is a cave formed?
heat homes, produce electricity, and manufacture iron and steel
How is coal used in the United States?
by extremely hot rock which it rests upon
How is water heated in a hot spring?
petrified, mold, print, whole animal plant
What are four kinds of fossils?
concrete
What is a very durable artificial rock?
slate
What type of rock is used to make chalkboards?
because rivers deposit sediment at their basins and the sediments build up layer by layer to form sedimentary rock
Why are rocks found near a river delta usually sedimentary rocks?
lava
magma that has erupted through the earth's
magma
melted/molten rock inside the earth's mantle
