4) Which bond from each set is the longest? a. N - O or N = 0
b. B - N or B - F
c. Si - O or Si - I
d. C-Cl or C-F

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

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.

How have the greenhouse gasses increased from the year 2000 to 2018