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Evidence of a Reaction
Vocabulary
100
A student dissolves a salt in water for a lab. This is....
What is NOT evidence of a chemical reaction?
100

Formed when two or more atoms chemically combine 

Word Bank: reactants, chemical reaction, atom, product, molecule

What is molecule?

200
A student drops a piece of Mg metal into a beaker of HCl solution. He notices bubbles forming on the metal. The type of evidence of a reaction.
What is forming bubbles?
200

A process that leads to the transformation of one set of chemical substances to another

Word Bank: reactants, chemical reaction, atom, product, molecule

Chemical Reaction

300
You want some sweet tea so you grab a pitcher from the fridge. You notice some sugar sitting in the bottom of the pitcher. Is this evidence of a chemical reaction?
What is NO?
300

Smallest part of a substance

Word Bank: reactants, chemical reaction, atom, product, molecule

Atom

400
A student mixes some yellow KI solution with blue CuSO4 solution and an ivory colored solid forms and settles to the bottom of the beaker. The 2 pieces of evidence a reaction occurred are....
What are color change and precipitation?
400

The substances initially involved in a chemical reaction

Word Bank: reactants, chemical reaction, atom, product, molecule

Reactants

500
While camping in the woods on a cold night, you build a campfire near your tent. Sitting near the entrance to the tent, under a tarp, you suddenly feel water dripping onto your neck. You look up and see water drops on the tarp. The piece of evidence you have that a campfire is a chemical reaction is....
What is formation of water?
500

The substance that is produced from a chemical reaction

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