Student Exploration: Collision Theory
Vocabulary: activated complex, catalyst, chemical reaction, concentration, enzyme, half-life,
molecule, product, reactant, surface area
Prior Knowledge Questions (Do these BEFORE
...
Student Exploration: Collision Theory
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_____
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: Reactant A has 2 vertical blue dots. Products:
Reactant B has 2 vertical green dots with
An orange dot in between them.
2. Click Play ( ). What do you see? __
____I see Reactant A bouncing with and combining with Reactant B
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