The above video named "Part 1" shows water being heated on a hot plate. No other substances were involved. Is this a chemical change or a physical change?
Question 2
2.
Explain your answer to question #1.
Question 3
3.
Is the system in the video labeled "Part 1" and open or closed system? Explain your answer.
Question 4
4.
Name two physical properties of the water in the above video.
Question 5
5.
Would you expect the mass of the system in the video labeled "Part1" to increase, decrease, or stay the same?
Question 6
6.
Why do you think that would happen to the mass?
Question 7
7.
Draw a "before" particle diagram and an "after" particle diagram of the system in the video "Part 1".
As you watch the video labeled "Part 2", pay special attention to what is happening in the the test tubes. Also, pay attention to the mass of the system.
Question 8
8.
Is the process in the video labeled "Part 2" a chemical change or a physical change?
Question 9
9.
What evidence leads you to believe that it was a physical or chemical change?
Question 10
10.
Did the mass of the system increase, decrease, or stay the same?
Question 11
11.
We have a special term for the yellow solid stuff that formed in the test tube. This term was introduced in Unit 1. What is this term?
Question 12
12.
Draw a "before" particle diagram and draw an "after" particle diagram for video "Part 2".
In the video labeled "Part 3", pay special attention to the mass.
Question 13
13.
Did the above video labeled "Part 3" show a chemical change, or a physical change?
Question 14
14.
What evidence leads you to believe that it was a physical or chemical change?
Question 15
15.
In video "Part 3" the mass of the system
Question 16
16.
Why do you think that happened to the mass?
Question 17
17.
The system in video "Part 3" was an
Question 18
18.
Draw a before particle diagram and an after particle diagram showing the process in video "Part 3".