____ is a critical aspect of science. a. The ability to operate ...

[s.tung]

____ is a critical aspect of science.
  a. The ability to operate in reverse
  b. The ability to be refined with new information
  c. Looking at data rather than being told
  d. All of these choices are critical aspects of science

Question 2

How old are fossils that indicate the first life forms on Earth?
  a. Between 1.2 and 1.5 billion years old
  b. Between 2.6 and 2.7 billion years old
  c. Between 3.4 and 3.5 billion years old
  d. Between 4 and 4.2 billion years old

[akpaschal]

Answer to Question 1

ANS: D
Science is a dynamic process. Scientific theories have the ability to change or be refined as new
information is obtained. Science can even operate in reverse by using laws and theories to predict what
could happen. Information can be found in the section Marine Scientists Use the Logic of Science to
Study the Ocean

Answer to Question 2

ANS: C
Bacteria-like fossils have been found in northwest Australia. These are the oldest fossils found to date.
There is additional evidence found near Greenland in the form of carbon residue in some of the rocks
which could represent life as far back as 3.85 billion years ago. Information can be found in the section
Life Probably Originated in the Ocean.

[s.tung]

Thanks

[akpaschal]

Welcome