Katie is looking at particles of reactants, and is noting that they currently are moving very quickly, and that they seem to have a lot of energy. These particles are likely at a temperature that is
higher lower
A B
At higher temperatures, particles of reactants have more energy, so they move faster. They are more likely to bump into one another and to collide with greater force.
energy
higher
more
MORE
MORE
temperature
alot of
temperature
energy