The freezing and thawing action of water affects a rock by?
a. transforming the rock into igneous rock
b. chemically changing the rock
c. gradually breaking down the rock into smaller pieces
d. leaving behind sendimentary particles from evaporated solutions

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.

Which of the following reasons best explains why a scientist would want to replicate gregor mendel's pea plant experiment? a. to discover new aspects of the natural world b. to test the predictions of current theories c. to explain recently observed phenomena d. to test the conclusions of prior investigations