Which of these statements is true?
a. the title of the paper should convey the exact focus, meaning, and purpose of the paper.
b. the title of the research paper is the thesis statement.
c. a reliable web resource presents opinions as facts and is sponsored by advertisements.
d. thesis statements, once written, cannot be revisited.

Which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.