Water is classified as an inorganic compound because it A) does not contain carbon
B) does not contain nitrogen
C) contains hydrogen
D) contains oxygen

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Which muscle cell structure stores calcium ions that are used to trigger the contraction?