All of the following cause mechanical weathering . ice
b. tree roots
c. burrowing animals
d. carbonic acid)

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Two atoms with different mass number but the same atomic number are called a) elements. b) ions. c) isotopes. d) nuclei.

Which tools do meteorologists use to create weather forecasts? check all that apply. a)guesses b)computer models c)weather service maps d)data from instruments e)personal observations