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.
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.
Question 9
9.
What evidence leads you to believe that it was a physical or chemical change?
Question 10
10.
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.
Question 14
14.
What evidence leads you to believe that it was a physical or chemical change?
Question 15
15.
Question 16
16.
Why do you think that happened to the mass?
Question 17
17.
Question 18
18.
Draw a before particle diagram and an after particle diagram showing the process in video "Part 3".
Question 19
19.
State the Law of Conservation of Mass.
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?
chemical change
physical change
Would you expect the mass of the system in the video labeled "Part1" to increase, decrease, or stay the same?
Increase
Decrease
Stays the same
Is the process in the video labeled "Part 2" a chemical change or a physical change?
Chemical Change
Physical Change
Did the mass of the system increase, decrease, or stay the same?
Increase
Decrease
Stayed the Same
Did the above video labeled "Part 3" show a chemical change, or a physical change?