Earth is part of which of the following systems? the Milky Way Galaxy
the solar system
the universe
all of the above

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

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.

What was bohr’s contribution to the planetary model