fossils Flashcards
fossil
any remains or trace for a formerly living thing preserved by natural processes
petrified fossils
a fossil that has been transformed into stone through a process called petrification.
cast fossil
made when minerals fill up the space left by decayed organisms reating a solid copy of the organism
molds
a hollow sediment that preserves the shape and texture of a dead organisms but not the organism itself.
trace fossils
fossilized evidence of an animals trace rather than its body.
microfossils
a fossil or fossil fragment that can be seen only with a microscope
amber fossils
fossilized tree resin that contain organisms ussually insects.
ice fossils
a frozen organism that has been preserved in ice or snow.
asphalt traps
areas where natural asphalt forms pools that trap animals and preserve their remains
paleontology
area of science that organizes and classifies fossils
index fossils
the remains of plants and animals that have egsisted only for a limited geological period
fossil fuels
a natural energy source that is believed to have formed from fossilized organisms examples.
Carolus linnaeus
man who invented animal classification system.
scientific names
names that ussually come from latin words to set them apart from other similiar organisms
lignite
type of coal dark brown and relitively soft and crumbly.
bituminous
denser and harder than ignite. ussually black but can be brown
anthracite
hardest form of coal, it is verry dark and metallic luster
natural gas
almost always found in crude oil. it is mostly the organic gas methane, wich is the simplest hydrocarbon.
methane, ethane, propane
different kinds of carbon gasses.
impermeable
like shale
phytoplankton
what petroleum and natural gas came from.
inorganic gas
such as helium, hydrogen and nitrogen are often found in oil wells.
abiogenic oil
a oil that some geologists think didn’t come from fossils
greenhouse gases
gases like carbon oxide that contaminate the environment.
