True false combustion, or burning, is a kind of oxidation. rain forest plants produce about percent of the oxygen in our atmosphere. when photosynthesis takes place in green plants, oxygen atoms are freed by the splitting apart of . a. true b. false oxygen atoms do not combine with many other elements.

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a).it must be applicable to future events and occurrences. b)it must be based on scientific observations that can be repeated in a controlled setting. c)it must be open to modification if new evidence doesn't completely support it. d)it must be consistent with only a small portion of relevant observations or data.