Please I need help with my homework. Fossils/Rock?

Question

please, help, i've been at the hospital & my step father almost went to jail.!!! I had 3 wholes days to do 34 questions. . . i know i know. . . but here r 9 questions i couldn't find or didn't understand, and i would be very happy if you could help me
1: Processes that Igneous rocks can go thru
2:Proces of Metamorphic rock
3:Explain Cast & Molds
4:How r trace fossils differant from other fossils
5:What does fossil pollen tell us about the past?
6:Explain the Law of Uniformitarianism?
7:What environment would be best 4 fossilization?
8:list 4 ways once living things can be fossilized?
9:Why are original remains fossils differant from all other types of fossils?

Answer 1

Sorry to hear about you recent bad luck. Hope this helps and that things improved for you. Good luck. If you need more info - just send me a mail through here.

1. Igneous rocks are formed when magma (molten lava) cools and solidifies. The most common type are basalt & granite. Igneous rocks can change into Metamorphic rocks due to intense heat & pressure. Also, a metamorphic rock can change into a different metamorphic rock. The heat and pressure that form metamorphic rocks often deform the rock, giving rise to a variety of textures and structures collectively referred to as fabric.

2. Heat, pressure within the earth contributes to the formation of metamorphic rocks by changing the texture and mineral density of rocks.

3. Casts and molds are types of fossilization where the physical characteristics of organisms are impressed onto rocks, especially coarse porous rocks such as sandstones. Typically, the hard parts of an organism (shells of mollusks, skeletal structures of coelenterates, bones and teeth of vertebrate, chitinous exoskeleton of arthropods, trunks of trees, and many sphenophyte) leave the best impressions. These hard structures are usually composed of calcium carbonate, calcium phosphate, silica, or chitin, and do not decay as easily. The rigidity of the hard body parts also allows the sediment to form around the organism. Soft body parts decay too fast for impressions to form and are not rigid enough for a mold to set around.
Two types of molds are possible: external and internal. An external mold is created with the dissolution of the organic which then leaves an empty cavity imprinted with the external details of the organism. An internal mold may form with hollow structures. The "shell" of the organism is filled with various inorganic materials such as sediment or crystals. When the shell dissolves, it leaves an impression of the interior surface of the shells (e.g., muscle scars) on the material.
A cast of the organism can then be made using the two types of molds. Natural casts are formed when minerals are deposited within the mold. Casts can also be synthetically created when the molds are filled or covered with synthetic material, such as latex or plaster of paris, to generate a replica of the organism. In this manner, cast and mold fossilization enables us to "recreate" the structure of the organism.

4. Tracks and trails can categorized as trace fossils. As with all other trace fossils, tracks and trails tell more about the organism's behavior rather than the organism itself. These traces are typically formed when an organism moves over the surface of soft sediment and leaves an impression of its movement behind.

5. Because of the fact that most pollen can routinely be identified primarily to plant genus or family, fossil pollen is important for providing a generalized view of past vegetation.

6. This is a term meant to convey a sense of order and regularity in the operation of nature and a sense that there was a uniformity of rates of geological processes through time. In other words, the Rules of Nature have remained uniform. The rivers, rocks, seas, and continents have changed over time, but the laws which describe those changes, and the rules to which they are subject, have remained invariably the same.

7. Something like a flash flood that would trap many animals whose remains will be quickly buried as the mud and silt carried by the flood is deposited. Sediment builds up over buried remains and pressure drives water out and converts the sediment to rock. During the lifetime of the rock, water filtering through it dissolves some minerals and deposits them at other sites, and deposits different minerals at the original site of the fossil. Water is an essential element in fossilization because it provides the necessary rapid burial, sedimentation, and then the medium for mineral replacement.

8. a) Freezing
b) Compression
c) Permineralization - a major method that involves the hardening of minerals that have entered the small pores and cavities of dead organisms. As hard water (water containing minerals) enter these pores, minerals are deposited and, under high pressures, becomes solid.
d) Entrapment in amber

9. Original remains are, for example teeth, bone, shell, or plant tissue. In other cases, over long periods of time, the original material may be chemically replaced and we see the structure of what once was.

Answer 2

1- igneous rocks go them melting, solidification, and when they are exposed on the surface, they go thru erosion
2- compaction, heating, and erosion
3 - not sure about this but... a cast is where the soft body of a dead thing gets coated with mud, when the body rots away, something else fills up the space that was left behind.
4- not sure of this either but a trace is like a cast
5-fossil pollen tells us what plants were living and flowering when the material was deposited.
6- you should be able to find a definition at Wikipedia
7- an environment when lots of things die and get covered with mud or ash, big floods, volcanic eruptions.
8- buried in mud, buried in volcanic ash, stuck in pine sap (becomes amber), soaked with water that has a lot of minerals
9 not sure what "original" fossils are

I hope this is some help

Answer 3

I have 9 pieces of homework to do still :( 2 competitions they entered me in that I don't want to do 2 maths homework things 2 science homework pieces 2 English projects 1 revision pieces for a French test

Answer 4

I feel you should have asked one or two questions at a time. People want to help, but not do the whole thing for you. That's just part of being a student. I would suggest googling these and I am sure you'll have luck!