Apologia General Science Module 7
Terms in this set (27)
an imprint the object would make if pressed into clay (like footprints). Preserves only the shape and outer details of the creature.
solid rock that has the same shape and surface details as the original object. Preserves only the shape and outer details of the creature.
**We need a MOLD before we can have a CAST
the conversion of organic material into stone
are hard and rock-like. The original materials in the remains have been replaced by minerals, and must be soaked in mineral-rich water to form
number of general features of the fossil record
strange-looking fish assumed to be extinct
a sticky, liquid substance that usually hardens when exposed to air, amber is derived from resin
A creature that lived near the bottom of the ocean, had a hard shell, and is assumed to be extinct
types of fossils
1-molds and casts; 2-petrified remains; 3-carbonate residues; 4-impressions; 5-creatures trapped in ice; 6-creatures trapped in amber
Do most plants and animals become fossilized when they die?
No, most plants and animals simply decay when they die.
Which kinds of fossils do not decompose as quickly as other fossils?
Fossils that are in ice or amber
Approximately how many species of plants and animals have gone extinct in the last 400 years?
What are the similarities and differences between carbonate residues and impressions?
Similarities - Formed by same process, leave an outline of the creature
Differences - In a carbonate residue, there is a filmy residue. In an impression, the filmy residue is gone.
the sum total of all discovered fossils
the view that most of earth's geological features are the result of large-scale catastrophes such as floods, volcanic eruptions, etc. (young earth - 6000 to 7000 years)
the view that most of earth's geological features are the result of slow, gradual processes that have been at work for millions or even billions of years (old-earth)
a term applied to a species of plant or animal that was once living but now is not
the preserved remains of a once-living organism
first general feature of the fossil record
Fossils are usually found in sedimentary rock. Since most sedimentary rock is laid down by water, it follows that most fossils were laid down by water as well.
second general feature of the fossil record
The vast majority of fossils are of clams and other hard-shelled creatures. Most remaining fossils are of either water-dwelling creatures or insects. Only a tiny, tiny fraction of the fossils we find are of plants, reptiles, birds, and mammals.
third general feature of the fossil record
Many of the fossils we find are of plants and animals which are still alive today. Some of the fossils we find are of plants and animals which are now extinct.
fourth general feature of the fossil record
The fossils found in one layer of stratified rock can be considerably different than the fossils found in another layer of the same stratified rock.
the fossil resulting after the thin, filmy residue of the carbonate residue is gone and just the impression of the film remains
Not from a living creature
From a living creature
a fossil formed by the thin, filmy residue left when the liquids and gases of a creature's remains are forced out of the creature by great pressure after it has been buried in sediment. Plants are well suited to provide carbonated fossils.
creatures trapped in ice or amber
these fossils give the most detail about the original creature because it slows the decaying process.