" Life on Earth originated from the condensation of carbon monoxide molecules on hot mineral surfaces underground to form fatty acids,the building blocks of cellular membranes." This statement is an example of:
A) a theory
B) a hypothesis
C) a natural law
D) an observation
Correct Answer:
Verified
Q29: Which is a solution?
A)element
B)compound
C)homogeneous mixture
D)heterogeneous mixture
Q30: A mixture of citric acid and water
Q31: Your lab instructor gives you a red
Q32: Which is a pure substance existing as
Q33: Which of the following diagrams represents a
Q35: What can you observe in the following
Q36: Which is a mixture?
A)copper wire
B)sugar
C)water
D)mud
Q37: Which is a pure substance ?
A)element
B)compound
C)mixture
D)both A
Q38: In which phase do the particles possess
Q39: Matter always has both mass and volume.
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