The biosphere, atmosphere, geosphere and hydrosphere. How do those spheres work together? Think about the effect it would have on the other spheres if one sphere were to stop working. How would this affect life on earth?

Compare and contrast physical changes with chemical changes.

What is the percentage of hydrogen in c2h4

The characteristics of two different types of reactions are shown below: reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of an element. which statement is true about the atoms of the elements that participate in the two reactions? their identity changes in both reaction a and reaction b. their identity changes in reaction a but not in reaction b. their identity changes in reaction b but not in reaction a. their identity remains the same in both reaction a and reaction b.