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U1.1a Mastery Check Physical and Chemical Changes

Last updated over 4 years ago

4 questions

Note from the author:

Classify Chemical and Physical Changes

Instructions

Objective:  I will successfully classify physical and chemical changes of matter

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Question 1

1.

Show your Work
Observe the various images representing physical and chemical changes. Use the toolbar to circle 3 examples of physical changes.

Question 2

2.

Show your Work
Observe the various images representing physical and chemical changes. Use the toolbar to circle 3 examples of chemical changes.

Question 3

3.

Read the following statement about the element calcium and Chicago's drinking Water. Then categorize the four red underlined components as physical or chemical properties or changes
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Chicago's tap water was found in 2018 to be unsafe (hard) due to its modertately high levels of calcium, a soft, silver/grey metal. Chicago water typically ranges from 130 to 150 mg/L of calcium while the safe (soft) range is considered 60–120 mg/l. In an effort to learn more about the effects of of calcium, investigators learn that while it has a Boiling point 1757 K (1484 °C, 2703 °F), it burns in air or pure oxygen to form the oxide and reacts rapidly with warm water to produce hydrogen gas and calcium hydroxide

reacts rapidly with warm water to produce hydrogen gas and calcium hydroxide
has a boiling point of 1757 K (1484 °C, 2703 °F)
burns in air or pure oxygen to form the oxide
soft, silver/grey metal

Physical Changes/Properties
Chemical Changes/Properties

Question 4

4.

a. Use the States of Matter Phet Simulation (click here) in order to demonstrate each substance undergoing phase changes from solid, liquid, to gas by the continued addition of heat. Make observations about the particles and their changes,

b. Which two of the following statements provides the best evidence which supports the following claim:

Phase changes represent physical changes and not chemical changes.

Chemical changes result in an irreversible change producing new substances.

Melting represents a chemical change because a new substance is produced.

Physical changes result in reversible changes and have the same composition of matter.