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U1.1b Mastery Check Physical and Chemical Changes

Last updated over 4 years ago

4 questions

Note from the author:

Mastery Check Physical Chemical Changed #2

Instructions

5

HS-PS1-1

HS-PS1-2

5

HS-PS1-1

HS-PS1-2

10

10

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

Question 1

1.

Show your Work
Observe the camp scenario representing physical and chemical changes.
[See image]
Which one of these are examples of a physical change?

chopped wood

marshmallow's roasted

burning wood

Question 2

2.

Show your Work
Observe the camp scenario representing physical and chemical changes.
[See image]
Which one of these are examples of a chemical change?

woodburning 

chopped wood

butter melting

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

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

Question 4

4.

Flint Michigan's water crisis was one of the most devastating human rights and environmental issues in recent history. The citizens in some of the most disadvantaged communities were ultimately exposed to high lead and microbial contamination leaving many to question how this could have occurred. The chemical aspects of this contamination is simply outlined in the Time article, Flint's water crisis Explain

Analyze the 3 animations in the Flint's Water Crisis Explained in 3 GIFs article to identify physical and/or chemical changes occuring in each scenario.

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

The contamination of lead in Flint's residence

Orthophospates flow through the water and stick to the walls of the pipes (GIF#1)

The color change in the water due to the oxidation of the metal in the pipers illustrated as reddish brown color (GIF #3)

soft, silver/grey metal 

Physical Changes/Properties

Chemical Changes/Properties

High chlorine levels in the water react with the pipes to cause corrosion, releasing lead into the water (GIF #2)