Which of the following is NOT a valid conversion factor? A. 12 hours/1 days
B. 1 yard/3 feet
C. 1 dozen/12 cookies
D. 60 seconds/1 minute

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Identify the electromagnets with poles that are reversed from the electromagnet shown above

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?