What is the first period of Earth's development called? A. Cambrian
B. Precambrian
C. Paleozoic
D. all of the above

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called

In what part of the body does the most muscle activity happen?