Kepler discovered that have elliptical orbits.
moons
comets
planets

all of the above
Help please??

What causes temperature extremes in the desert

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?