A chemical reaction is when one or more substances change and produce one or more new chemical substances. The substances that are involved in a chemical reaction and that are changed by it are ...

Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...

If they collide with enough energy, bonds can break and new bonds can form in a chemical reaction. The reactants just sit there until energy is added with the flame. The added energy is enough to make ...

A biochemical reaction is the transformation of one molecule ... which are biological catalysts that can alter the rate and specificity of chemical reactions inside cells.

Did you know that a really fast chemical reaction makes riding in a car safer? Most cars have airbags built into the dashboard and steering wheel that can blow up like super-fast balloons during a ...