Around the ages 9-14. On average, 12 is the average age.
Copied, I agree with the person above ^ :’)
Activation energy is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
for example , striking a match on the side of a matchbox provides the activation energy, in the form of heat produced by friction.
A conclusion is a final answer backed by evidence. An inference is a reasonable guess.