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Chemical Reactions Review 1

Test Description: Review of beginning vocabulary

Instructions: Answer all questions to get your test result.

1) Everything around us is made of ___.

Amixtures Batoms Ccompounds

2) If a chemical reaction occurs what kind of change MUST happen?

Achemical Bphysical Ctechnological

3) EVERY chemical reaction produces ___ substances that are different than the substances that started the reaction.

Afour Bnew Csame

4) Observable changes that indicate a chemical reaction occurred include 2 types. Name the 2 types.

Achanges in materials and changes in temperature Bchanges in size and changes in volume Cchanges in properties and changes in energy

5) Reactions that ABSORB energy and DECREASE temperature are called ____

AMESOTHERMIC BEXOTHERMIC CENDOTHERMIC

6) Reactions that RELEASE energy and INCREASE temperature are called

AENDOTHERMIC BINTROTHERMIC CEXOTHERMIC

7) If two chemicals are mixed together and BUBBLES are produced, what does this indicate?

AThat soap was put into the reaction. BThat gases are produced CThat a new substance is NOT formed.

8) Milk and Vinegar are mixed together. Small solids are produced. We call these solids ____

APrecipitation Bexotherms CPrecipitates

9) Is the melting of wax a chemical reaction?

AClaim: Yes melting wax is a chemical reaction because the wax changes into a liquid BClaim: No the melting wax is NOT a chemical reaction because the melting wax is just a change in state.

10) The beginning temperature of a beaker of liquid is 86 degrees. Then another liquid is added and the temperature drops to 80 degrees. What kind of energy change is this?

AENDOTHERMIC BEXOTHERMIC

*select an answer for all questions

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