The minimum amount of energy required to overcome the energy barrier in a chemical reaction is the
a. heat of reaction.
b. activation energy.
c. kinetic energy of the reactants.
d. enthalpy of the products.

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.