POWERPOINT JEOPARDY

1
Chapter 10, Section 1-5
2
fossils Relative age of rocks Radioactive dating Geological time scale Early Earth
10 10 10 10 10
20 20 20 20 20
30 30 30 30 30
40 40 40 40 40
50 50 50 50 50
3
Question 1 - 10

• are the preserved remains or traces of living
  things.

4
Answer 1 10

• fossils

5
Question 1 - 20

• Fossils provide evidence of

6
Answer 1 20

• how life has changed over time

7
Question 1 - 30

• a hollow area in sediment in the shape of or part
  of an organism.

8
Answer 1 30

• mold

9
Question 1 - 40

• evidence of the history of life and past
  environments on Earth is called

10
Answer 1 40

• The fossil record

11
Question 1 - 50

• List the steps of how fossils are most commonly
  formed

12
Answer 1 50

• Organism dies
• Organism is buried by sediment
• Sediment hardens and preserves fossil

13
Question 2 - 10

• The number of years since the rock formed

14
Answer 2 10

• absolute age

15
Question 2 - 20

• In horizontal sedimentary rocks, the oldest layer
  is at the bottom and the newest layer is on the
  top and determines the relative ages of rocks

16
Answer 2 20

• The Law of Superposition

17
Question 2 - 30

• the surface where new rock meets up with a much
  older rock surface.

18
Answer 2 30

• Unconformity

19
Question 2 - 40

• What is an index fossil?

20
Answer 2 40

• A fossil that is widely distributed and
  represents a type of organism that only existed
  briefly

21
Question 2 - 50

• Index fossils are useful because-

22
Answer 2 50

• tell the relative ages of rock layers by how they
  occur

23
Question 3 - 10

• As elements break down over time they release
  particles and energy in a process called

24
Answer 3 10

• radioactive decay

25
Question 3 - 20

• How fast or slow the radioactive elements decay
  is always constant (never changing) and the rate
  of decay is called

26
Answer 3 20

• half-life

27
Question 3 - 30

• Very useful in dating rocks because it has a long
  half-life

28
Answer 3 30

• Potassium-Argon Dating

29
Question 3 - 40

• When carbon-14 is left in an organism, scientists
  measure this amount that is left to find absolute
  age. Is the carbon-14 the radioactive element or
  the new element formed?

30
Answer 3 40

• radioactive

31
Question 3 - 50

• Why is Radioactive dating is good for igneous
  rocks but not sedimentary rocks

32
Answer 3 50

• Scientists can date particles but not layers in
  sedimentary rocks.
• Scientists can only date solid rocks.

33
Question 4 - 10

• a record of the life forms and geologic events in
  Earths history

34
Answer 4 10

• geological time scale

35
Question 4 - 20

• After Precambrian Time, basic units of the GTS are

36
Answer 4 20

• eras and periods

37
Question 4 - 30

• three long units of time from Precambrian Time to
  the present, Ex The Paleozoic, Mesozoic, and
  Cenozoic

38
Answer 4 30

• Eras

39
Question 4 - 40

• Later, _________________________determined
  absolute age of divisions in the GTS

40
Answer 4 40

• radioactive dating

41
Question 4 - 50

• What happened during the Precambrian time period?

42
Answer 4 50

• 1st oceans, atmospheres, landforms, and
  single-celled organisms.

43
Question 5 - 10

• Scientists hypothesize that the Earth formed at
  the same time as other planets and the sun at
  what time?

44
Answer 5 10

• about 4.6 billion years ago

45
Question 5 - 20

• Earth started as a ball of

46
Answer 5 20

• dust, rock, and ice in space

47
Question 5 - 30

• As Earth cooled, water vapor condensed forming
  rain, accumulating to form

48
Answer 5 30

• The oceans

49
Question 5 - 40

• Without earths earliest life forms we would have
  no

50
Answer 5 40

• Oxygen/ozone

51
Question 5 - 50

• How did the earth take shape?

52
Answer 5 50

• Gravity pulled the mass together and thermal
  energy heated up the earth.