Collision theory gizmoDONE..

Vocabulary: activated complex, catalyst, chemical reaction, concentration, enzyme, half-life,
molecule, product, reactant, surface area
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
1. Suppose you added a spoonful of sugar to hot water and another to ice-cold water. Which
type of water will cause the sugar to dissolve more quickly? Hot water.
2. Suppose you held a lighted match to a solid hunk of wood and another match to a pile of
wood shavings. Which form of wood will catch fire more easily? Wood shavings.
Gizmo Warm-up
A chemical reaction causes the chemical compositions
of substances to change. Reactants are substances that
enter into a reaction, and products are substances
produced by the reaction. The Collision Theory Gizmo™
allows you to experiment with several factors that affect
the rate at which reactants are transformed into products
in a chemical reaction.
You will need blue, green, and orange markers or colored
pencils for the first part of this activity.
1. Look at the key at the bottom of the SIMULATION pane. In the space below, draw the two
reactants and two products of this chemical reaction.
Reactants: A Products: A
B
B
2. Click Play ( ). What do you see? The first three were reactants A and B but reactants
A took part of reactants B and then turned into products A and B.