6th Grade Unit#1 -Earth History Homework

6th Grade Unit#1 -Earth History Homework




Directions: Please copy these homeworks in your journal and answer them in your journal.

Be sure to do one per night  

HOMEWORK   Name        Date           Day#1

Date ___________________ (Key 1 - Answer ID # 0277770)

Write each word three times.

Law of Superposition

Sediments

fossil

Cast

adaptation

time

Period

Cementation

Petrified Remains

natural selection

Deposition

Radioactive decay

Fossil

cast

Evolution

HOMEWORK   Name        Date           Day#2

Name _____________________________

Date ___________________ (Key 1 - Answer ID # 0277770)

Write the letter for the word that best matches the definition.

1.   When the entire organism is preserved. Ways this could take place are in tar, amber(hardened sap) or by freezing.  2.   someone who studies rocks and earth  3.   Become invisible or unnoticeable.    4.   an object that early people had made  5.   a law that states that successive layers of rock or soil were deposited on top of one another and the lowest level is oldest  6.   The formation of large rocks from particles of sediment that occurs as pressure is applied.  7.   The preserved remains or traces of an organism that lived in the past  8.   any structure or behavior that helps an organism survive in its enviornment; develops in a population over a long period of time.  9.   An impression produced by pressure or printing.    10.   The term used to describe the process advanced by Charles Darwin that plants and animals best suited for their conditions survive to pass on their dominant traits  11.   process by which sediment settles out of the water or wind that is carrying it.  12.   Fossils that form when some or all of the original materials that made up organisms are replaced with minerals.

A.   natural selection B.   Cementation C.   Petrified Remains D.   adaptation E.   Imprints F.   Law of Superposition G.   Fossil H.   Deposition I.   disappeared J.   Preserved Remains K.   artifact L.   Geologist

HOMEWORK   Name        Date           Day#3

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Paleontologist Deposition Geologist Extinct Era Cementation Sediments artifact Fossil

_______________	1.	The ____ studied the earth's core.
_______________	2.	After a period of time ____ become pressed together to form rock.
_______________	3.	Increases in pressure and temperature cause lithification, the process that changes ____ into sedimentary rock.
_______________	4.	Volcanoes are described as active, dormant, or ____.
_______________	5.	The Mesozoic ____ began 245 million years ago.
_______________	6.	____ are materials or matter carried by moving water.
_______________	7.	The ____ was deposited by the wind.
_______________	8.	The ____ is looking for dinosaur fossils.
_______________	9.	The ____ studied the fossils to dtermine the age of the dinosaur.
_______________	10.	Fossilized bones gave the ____ clues to early man.
_______________	11.	The Anasazi left more than one ____ behind at Mesa Verde.
_______________	12.	____ can be caused by water, wind, or ice.
_______________	13.	A ____ is remains of a plant or animal that lived long ago.
_______________	14.	The Dodo bird is now ____.
_______________	15.	I have never seen any examples of ____.
_______________	16.	____ takes place when small pieces of sediment come together when under pressure.

HOMEWORK   Name        Date           Day#4

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Paleontologist adaptation Geologist artifact Era Deposition Sediments Evolution Fossil

_______________	17.	____ are pieces of rock, shells, and other things.
_______________	18.	Sedimentary rock can be formed from ____ such as sand that is pressed or cemented together.
_______________	19.	the ____ of the sediment caused the mountains erosion.
_______________	20.	____ fuels, named because they developed from fossils, include coal, oil and natural gas.
_______________	21.	The ____ found a rare fossil.
_______________	22.	Charles Darwin was the creator of the Theory of ____.
_______________	23.	Miss Edwards's class took the ancient bone to the ____ for study.
_______________	24.	The ____ found a rare fossil specimen.
_______________	25.	The ____ of earth's surface creates landforms such as: deltas, alluvial fans and meanders.
_______________	26.	A delta is formed by the ____ of silt at the mouth of a river.
_______________	27.	The smelly spray of a skunk is an ____ that protects it.
_______________	28.	He used radiocarbon dating to determine how old the ____ was.
_______________	29.	Gymnosperms first appeared in the Paleozoic ____ and continued to adapt to their changing environment.
_______________	30.	The ____ analyzed the structure of the mineral.
_______________	31.	Rocks and sediment are forms of ____.

HOMEWORK   Name        Date           Day#5

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Cementation Sediments Evolution Extinct Era Deposition Geologist artifact Fossil

_______________	32.	A ____ is a scientist who studies rocks to learn about the history and structure of the Earth.
_______________	33.	The rocks formed as the ____ were crushed together over millions of years.
_______________	34.	By studying a stratum of rock, you can learn a lot about a geolical ____.
_______________	35.	The ____ had a fern imprint on it.
_______________	36.	Through ____, new organims are created.
_______________	37.	____ harden into sedimentary rock on the earth's surface.
_______________	38.	Deltas are formed by ____.
_______________	39.	If one species of animal becomes ____, it will impact all other plants and animals in that ecosystem.
_______________	40.	Changes in the environment effect the ____ of populations.
_______________	41.	The paleontologist showed us some of the ____ remains he had uncovered.
_______________	42.	He found an American Indian ____ while digging in his backyard.
_______________	43.	As the buffalo began to decrease sharply in numbers, conservationists feared that it might become totally ____.
_______________	44.	____ caused the soil to form a huge rock on the beach.
_______________	45.	____ made by weathering are put in a new place by deposition.

HOMEWORK   Name        Date           Day#6

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Paleontologist adaptation Geologist artifact Cementation Sediments Evolution Fossil

_______________	46.	____ fuels are nonrenewable resources.
_______________	47.	I would like to become a ____ and travel around the world.
_______________	48.	The ____ showed us some of the fossil remains he had uncovered.
_______________	49.	"Survival of the fittest" was part of Darwin's theory of ____.
_______________	50.	____ binds particles and rock fragments together.
_______________	51.	The ____ had a fern imprint on it.
_______________	52.	What type of ____ did the dinosaur use to eat meat?
_______________	53.	An ____ belonging to another King Tut was found by Indiana Jones.
_______________	54.	The ____ found the animals prints in the rock.
_______________	55.	The ____ found the woolly mammoth completely preserved in the ice.
_______________	56.	The students saw an ____ of a caveman who lived during the Ice Age in the museum.
_______________	57.	A leaf fell into the peat and became a ____.
_______________	58.	A ____ can estimate the age of a fossil by examining the stratum.
_______________	59.	The ____ showed us some of the fossils he had found.
_______________	60.	It takes alot of ____ to make a large sedimentary rock.
_______________	61.	An ____ of many animals that hunt at night is larger eyes.

HOMEWORK   Name        Date           Day#7

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Paleontologist Deposition Geologist Extinct Fossil Cementation adaptation artifact Period Era

_______________	62.	The ____ was surprised to find igneous rocks in this area.
_______________	63.	The Anasazi Indians left more than one ____ of cooking utensils behind at Mesa Verde.
_______________	64.	The ____ worked very carefully when digging up a fossil.
_______________	65.	A person's teeth is a structural ____.
_______________	66.	The ____ had a fish imprint on it.
_______________	67.	The ____ of an animal to its surroundings will help it survive.
_______________	68.	____ fuels are nonrenewable and are in danger of running out.
_______________	69.	The cambrian ____ was an era of explosive change on earth.
_______________	70.	The hidden treasure was found by the ____.
_______________	71.	The ____ came to the Adirondacks to study rock formation.
_______________	72.	Sand, silt and rock are left at the mouth of a river through a process called ____.
_______________	73.	Amphibians first appeared during the Devonian ____.
_______________	74.	The paleontologists made a cast of the print ____.
_______________	75.	Although the dinosaurs once lived, they are now ____.
_______________	76.	When a rock has gone through ____, it is like cementing it to something else. HOMEWORK   Name        Date           Day#8 Name _____________________________ Date ___________________ Complete each sentence. _______________ 1.   He found an American Indian (artifact, vanished, Era) while digging in his backyard. _______________ 2.   (Cast, Fossil, Cementation) fuels are nonrenewable and are in danger of running out. _______________ 3.   The paleontologists made a cast of the print (adaptation, Era, fossil) . _______________ 4.   As the buffalo began to decrease sharply in numbers, conservationists feared that it might become totally (Sediments, extinct, adaptation) . _______________ 5.   The (cast, paleontologist, fossil) worked very carefully when digging up a fossil. _______________ 6.   The (Compaction, geologist, Cementation) was surprised to find igneous rocks in this area. _______________ 7.   The Dodo bird is now (time, Radioactive decay, extinct) . _______________ 8.   Miss Edwards's class took the ancient bone to the (adaptation, Extinct, paleontologist) for study. _______________ 9.   The Mesozoic (era, Fossil, trace fossils) began 245 million years ago. _______________ 10.   The (Deposition, Extinct, geologist) came to the Adirondacks to study rock formation. _______________ 11.   What type of (Extinct, Preserved Remains, adaptation) did the dinosaur use to eat meat? _______________ 12.   (Petrified Remains, Cementation, Geologist) binds particles and rock fragments together. HOMEWORK   Name        Date           Day#9 Name _____________________________ Date ___________________ Complete each sentence. _______________ 13.   The (Law of Superposition, time, fossil) had a fern imprint on it. _______________ 14.   (Geologist, Fossil, Deposition) fuels are nonrenewable resources. _______________ 15.   The smelly spray of a skunk is an (Deposition, adaptation, Period) that protects it. _______________ 16.   A (Compaction, Sediments, paleontologist) can estimate the age of a fossil by examining the stratum. _______________ 17.   It takes alot of (Fossil, sediments, Deposition) to make a large sedimentary rock. _______________ 18.   The (paleontologist, fossil, Preserved Remains) showed us some of the fossil remains he had uncovered. _______________ 19.   Volcanoes are described as active, dormant, or (natural selection, disappeared, extinct) . _______________ 20.   Rocks and sediment are forms of (deposition, Cast, Sediments) . _______________ 21.   Through (evolution, Petrified Remains, time) , new organims are created. _______________ 22.   An (vanished, adaptation, artifact) of many animals that hunt at night is larger eyes. _______________ 23.   The paleontologist showed us some of the (fossil, Petrified Remains, Extinct) remains he had uncovered. _______________ 24.   (Artifact, Sediments, Disappeared) are pieces of rock, shells, and other things. HOMEWORK   Name        Date           Day#10 Name _____________________________ Date ___________________ Complete each sentence. _______________ 25.   The Mesozoic (Sediments, adaptation, era) is the geological era that started 225 million years ago and lasted 160 million years. _______________ 26.   The (trace fossils, Era, adaptation) of an animal to its surroundings will help it survive. _______________ 27.   the (deposition, Fossil, Cementation) of the sediment caused the mountains erosion. _______________ 28.   Charles Darwin was the creator of the Theory of (cast, Period, Evolution) . _______________ 29.   The (Fossil, Period, geologist) found a rare fossil specimen. _______________ 30.   (Compaction, Fossil, Disappeared) fuels, named because they developed from fossils, include coal, oil and natural gas. _______________ 31.   The (paleontologist, disappeared, natural selection) is looking for dinosaur fossils. _______________ 32.   Sand, silt and rock are left at the mouth of a river through a process called (deposition, Petrified Remains, fossil) . _______________ 33.   The (trace fossils, vanished, geologist) found a diamond on his rock hunting trip! _______________ 34.   The (paleontologist, Period, Geologist) studied the fossils to dtermine the age of the dinosaur. _______________ 35.   The (Law of Superposition, time, fossil) had a fish imprint on it. _______________ 36.   When a rock has gone through (cementation, Preserved Remains, fossil) , it is like cementing it to something else. _______________ 37.   Deltas are formed by (cast, Evolution, deposition) . HOMEWORK   Name        Date           Day#12 Name _____________________________ Date ___________________ Complete each sentence. _______________ 38.   The (natural selection, sediments, Era) was deposited by the wind. _______________ 39.   The (Period, fossil, scientists) had a fern imprint on it. _______________ 40.   The (Evolution, paleontologist, Compaction) showed us some of the fossils he had found. _______________ 41.   (Artifact, Scientists, Cementation) caused the soil to form a huge rock on the beach. _______________ 42.   The whole beach is made up of (Preserved Remains, sediments, Radioactive decay) called sand. _______________ 43.   Fossilized bones gave the (Era, Cast, paleontologist) clues to early man. _______________ 44.   Since coal was formed from the decayed bodies of plants that lived many millions of years ago, it is considered a kind of (artifact, Cast, fossil) fuel. _______________ 45.   By studying a stratum of rock, you can learn a lot about a geolical (Extinct, era, Geologist) . _______________ 46.   He used radiocarbon dating to determine how old the (trace fossils, Imprints, artifact) was. _______________ 47.   Gymnosperms first appeared in the Paleozoic (Evolution, era, Preserved Remains) and continued to adapt to their changing environment. _______________ 48.   The (Cementation, trace fossils, paleontologist) found the animals prints in the rock. _______________ 49.   A (Cementation, geologist, adaptation) is a scientist who studies rocks to learn about the history and structure of the Earth. HOMEWORK   Name        Date           Day#13 Name _____________________________ Date ___________________ Complete each sentence. _______________ 50.   The (Petrified Remains, Imprints, geologist) studied the earth's core. _______________ 51.   A leaf fell into the peat and became a (Radioactive decay, Preserved Remains, fossil) . _______________ 52.   (Fossil, Time, Sediments) are materials or matter carried by moving water. _______________ 53.   Many stone tools were used during the Paleolithic (Fossil, period, Deposition) . _______________ 54.   Sedimentary rock can be formed from (sediments, Imprints, Period) such as sand that is pressed or cemented together. _______________ 55.   The (Extinct, Paleontologist, deposition) of earth's surface creates landforms such as: deltas, alluvial fans and meanders. _______________ 56.   I would like to become a (Law of Superposition, geologist, Sediments) and travel around the world. _______________ 57.   The (scientists, paleontologist, Law of Superposition) found the woolly mammoth completely preserved in the ice. _______________ 58.   I have never seen any examples of (Paleontologist, cementation, Geologist) . _______________ 59.   If one species of animal becomes (Fossil, extinct, Cast) , it will impact all other plants and animals in that ecosystem. _______________ 60.   Although the dinosaurs once lived, they are now (Law of Superposition, extinct, fossil) . _______________ 61.   The Anasazi Indians left more than one (artifact, disappeared, Paleontologist) of cooking utensils behind at Mesa Verde. HOMEWORK   Name        Date           Day#14 Name _____________________________ Date ___________________ Complete each sentence. _______________ 62.   Increases in pressure and temperature cause lithification, the process that changes (scientists, trace fossils, sediments) into sedimentary rock. _______________ 63.   A (natural selection, vanished, fossil) is remains of a plant or animal that lived long ago. _______________ 64.   The Anasazi left more than one (scientists, Extinct, artifact) behind at Mesa Verde. _______________ 65.   The (Radioactive decay, geologist, Era) analyzed the structure of the mineral. _______________ 66.   The cambrian (Paleontologist, scientists, era) was an era of explosive change on earth. _______________ 67.   The rocks formed as the (sediments, trace fossils, Cementation) were crushed together over millions of years. _______________ 68.   A person's teeth is a structural (Imprints, adaptation, Evolution) . _______________ 69.   Scientists have suggested that the dinosaur became (cast, extinct, scientists) around 65 million years ago. _______________ 70.   An (artifact, Radioactive decay, Deposition) belonging to another King Tut was found by Indiana Jones. _______________ 71.   Amphibians first appeared during the Devonian (Paleontologist, Sediments, period) . _______________ 72.   Changes in the environment effect the (Paleontologist, evolution, vanished) of populations. _______________ 73.   A delta is formed by the (vanished, natural selection, deposition) of silt at the mouth of a river. HOMEWORK   Name        Date           Day#15 Name _____________________________ Date ___________________ Complete each sentence. _______________ 74.   (Period, Cast, Sediments) made by weathering are put in a new place by deposition. _______________ 75.   The students saw an (Fossil, Petrified Remains, artifact) of a caveman who lived during the Ice Age in the museum. _______________ 76.   The hidden treasure was found by the (Preserved Remains, geologist, natural selection) . _______________ 77.   (Adaptation, Cementation, Evolution) takes place when small pieces of sediment come together when under pressure. _______________ 78.   After a period of time (Imprints, sediments, Cast) become pressed together to form rock. _______________ 79.   (Geologist, Compaction, Deposition) can be caused by water, wind, or ice. _______________ 80.   (Sediments, Law of Superposition, Radioactive decay) harden into sedimentary rock on the earth's surface. _______________ 81.   The (geologist, disappeared, Cast) found a rare fossil. _______________ 82.   "Survival of the fittest" was part of Darwin's theory of (Geologist, Imprints, evolution) .

HOMEWORK   Name        Date           Day#16

Name _____________________________

Date ___________________

Complete each sentence using the words in the word list.

Sediments Extinct Fossil Geologist Period Era

_______________	77.	Since coal was formed from the decayed bodies of plants that lived many millions of years ago, it is considered a kind of ____ fuel.
_______________	78.	Many stone tools were used during the Paleolithic ____.
_______________	79.	The Mesozoic ____ is the geological era that started 225 million years ago and lasted 160 million years.
_______________	80.	The whole beach is made up of ____ called sand.
_______________	81.	The ____ found a diamond on his rock hunting trip!
_______________	82.	Scientists have suggested that the dinosaur became ____ around 65 million years ago.

HOMEWORK   Name        Date           Day#17

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

1.  of millions decayed that years ago formed plants of lived it coal Since the of fuel many from was bodies kind considered a fossil is . ,

2.  geologist is to rocks history about structure and A a learn the Earth scientist of studies the who .

3.  Although extinct they once are lived now the dinosaurs . ,

4.  animal of is A remains long plant ago lived fossil a or that .

5.  began ago 245 The Mesozoic era years million .

6.  that An of many hunt adaptation is eyes larger animals at night .

7.  named natural fossils include gas fuels developed from they Fossil because coal and oil , . , ,

8.  found the animals the prints The in paleontologist rock .

HOMEWORK   Name        Date           Day#18

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

9.  became A fossil leaf and fell a the into peat .

10.  millions of together The were over sediments years rocks the formed crushed as .

11.  the world would around become like and a travel geologist I to .

12.  used old to the how radiocarbon determine He was artifact dating .

13.  at Mesa more of Indians Anasazi cooking The than artifact one behind Verde utensils left .

14.  be such or pressed cemented as can sand that from is Sedimentary sediments together formed rock .

15.  artifact behind left at Verde than more one Mesa Anasazi The .

16.  The a print paleontologists cast fossil made the of .

HOMEWORK   Name        Date           Day#19

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

17.  mammoth woolly The in found ice the preserved the completely paleontologist .

18.  rare specimen found geologist a fossil The .

19.  rock a deposition are Sand called at river process through of the and a silt mouth left , .

20.  in rocks this The area igneous to was find geologist surprised .

21.  help animal survive will The it to an its adaptation surroundings of .

22.  formation to the Adirondacks came study rock to The geologist .

23.  remains us he fossil showed the of The some had paleontologist uncovered .

24.  pieces and things rock other are shells of Sediments , , .

HOMEWORK   Name        Date           Day#20

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

25.  The of he fossils some us showed paleontologist had the found .

26.  during first Amphibians appeared Devonian period the .

27.  By learn stratum a a of a geolical rock lot can studying you about era , .

28.  imprint The on had fossil a fern it .

29.  sediments was by The the wind deposited .

30.  65 extinct became Scientists million dinosaur the around suggested that have years ago .

31.  that extinct sharply might decrease numbers feared in to buffalo become it conservationists the began As totally . ,

32.  in will one plants it and species ecosystem animals If extinct animal becomes impact of that other all . ,

HOMEWORK   Name        Date           Day#21

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

33.  type dinosaur meat the use adaptation did to eat of What ?

34.  effect the in Changes the of environment populations evolution .

35.  is for looking fossils paleontologist The dinosaur .

36.  and are Fossil of nonrenewable out danger fuels in running are .

37.  s The geologist studied earth the core ' .

38.  by can water ice be Deposition or wind caused . , ,

39.  made Sediments a in put place by are weathering by deposition new .

40.  the of museum students who artifact the caveman a an The lived during Ice saw in Age .

41.  deposition are formed by Deltas .

HOMEWORK   Name        Date           Day#22

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

42.  in changes rock the lithification process cause temperature into sediments that sedimentary and Increases pressure , .

43.  such alluvial creates of s deltas deposition as: meanders earth and surface The fans landforms . ' ,

44.  The on rock geologist hunting diamond trip his found a !

45.  a fish The imprint fossil it on had .

46.  The adaptation smelly protects skunk that a is spray it an of .

47.  digging paleontologist The when fossil worked carefully very up a .

48.  the the of mineral structure geologist The analyzed .

49.  have examples cementation never of any seen I .

HOMEWORK   Name        Date           Day#24

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

50.  Evolution creator the was Darwin Charles of Theory of the .

51.  a beach Cementation to form the caused on the rock huge soil .

52.  fossils to The studied paleontologist the of dtermine the the dinosaur age .

53.  fittest" of part the evolution of s " Survival of Darwin was theory ; ' ; .

54.  now is bird extinct The Dodo .

55.  at is formed the A silt of river by the a mouth of delta deposition .

56.  Volcanoes as active described dormant extinct are or . , ,

57.  fuels resources nonrenewable Fossil are .

HOMEWORK   Name        Date           Day#25

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

58.  of us had paleontologist some the he remains fossil uncovered The showed .

59.  gave paleontologist Fossilized to the bones clues man early .

60.  of stratum the fossil estimate examining paleontologist the age by a can A .

61.  era era of on was change an cambrian The earth explosive .

62.  sediment are deposition Rocks and of forms .

63.  pieces when place pressure Cementation takes when small of together sediment come under .

64.  a together After become rock sediments form period to pressed of time .

65.  artifact Indiana King by to Tut belonging An was found Jones another .

HOMEWORK   Name        Date           Day#26

Name _____________________________

Date ___________________

Rewrite each sentence in the correct order and using the correct punctuation.

66.  the in to appeared Gymnosperms Paleozoic and first era changing continued their environment to adapt .

67.  together binds fragments rock Cementation particles and .

68.  new are Through created evolution organims . ,

69.  paleontologist s to took for Edwards ancient Miss study the bone the class ' .

70.  hidden geologist was found The by treasure the .

71.  mountains erosion sediment the the caused of the deposition .

72.  fossil found geologist rare The a .

73.  sedimentary harden surface rock s earth the into Sediments on ' .

HOMEWORK   Name        Date           Day#27

Name _____________________________

Date ___________________ (Key 1 - Answer ID # 0277770)

Select the definition that most nearly defines the given word.

1.   disappeared   Become invisible or unnoticeable.     A particular moment measured by hours, minutes, and seconds on a clock.	2.   artifact   a man-made item from long ago   the pressing together of rocks, sediment, and so on to make a hard mass
3.   adaptation   an object created when sediment fills a mold and become rock   Changes made over time by a species of plant or animal allowing it to survive in an environment.	4.   Period   A unit of geological time during which a system of rocks formed.     process by which dissolved minerals crystallize and glue particles of sediment together into one mass.
5.   Deposition   process by which sediment settles out of the water or wind that is carrying it.   fossillized tracks and other evedince of animals activity.	6.   Imprints   an impression left in sediment before it hardens   the oldest fossils are in the lowest/bottom layer most recent are closest to top
7.   Extinct   not living any more, gone forever   Something that helps the animal survive.	8.   Compaction   process where populations get inherited changes over time   Squeezing together of sediments to form rock.
9.   Paleontologist   scienctist who studies ancient life forms   pieces of earth and rock that have been deposited by water, wind, or ice.	10.   Evolution   the material from a liquid that settles to the bottom   A process in which something passes by degrees to a different stage (especially a more advanced or mature stage).
11.   natural selection   The idea that those organisms best adapted to their environment will be the ones most likely to survive   to press or pack together.	12.   fossil   a preserved clue to life on Earth long ago   People who use experimentation, observation, and data analysis to draw conclusions.
13.   Sediments   people who observe and test facts to learn more about the world   pieces of earth and rock that have been deposited by water, wind, or ice.	14.   cast   A period marked by distinctive character or reckoned from a fixed point or event.     an object created when sediment fills a mold and become rock