In the first 10 seconds of the "Part 1" video there are two substances in two different test tubes. Name two physical properties of one substance in the first sentence of your answer. Name two phyical properties of the other substance in the second sentence of your answer.
Question 2
2.
When one substance was added to the other substance, was there a physical change or chemical change?
Question 3
3.
What evidence leads you to believe that it is a physical change or chemical change?
Question 4
4.
State 1 extensive property used in the experiment that describes the new product?
Question 5
5.
Rewatch the video and record the mass of the two substances, test tubes, and beaker at the beginning of the video and then record the mass of the substance(s), test tubes, and beaker at the end of the video. Did the mass increase, decrease, or stay the same?
Question 6
6.
Why do you think that happened to the mass?
Question 7
7.
Draw a "before mixing" particle diagram and an "after mixing" particle diagram. Particle diagrams were what you were working with on your tickets.
Question 8
8.
When one substance was added to the other substance, was there a physical change or chemical change?
Question 9
9.
Name two intensive properties in this experimnet describing the product?
Question 10
10.
Rewatch the video and record the mass of the two substances, beaker, and dropper bottle at the beginning of the video and then record the mass of the substance(s), beaker, and dropper bottle at the end of the video. Did the mass increase, decrease, or stay the same?
Question 11
11.
Why do you think that happened to the mass?
Question 12
12.
Draw 2 particle diagrams representing a situation AFTER the mixing took place. The first should represent a mixture using cold water and the second the water used was hot water.
Question 13
13.
When one substance was added to the other substance, was there a physical change or chemical change in "Part 3" video?
Question 14
14.
What evidence leads you to believe that it is a physical change or chemical change?
Question 15
15.
Was the system in the video an open system or closed system and why do you think that?
Question 16
16.
Rewatch the video and record the mass of the two substances, test tubes, and beaker at the beginning of the video and then record the mass of the substance(s), test tubes, and beaker at the end of the video. Did the mass increase, decrease, or stay the same?
Question 17
17.
Why do you think that happened to the mass?
Question 18
18.
Draw a before mixing particle diagram and an after mixing particle diagram.
Question 19
19.
State the law of conservation of mass.
Question 20
20.
An atom is
Question 21
21.
Which of the following is NOT a physical change?
Question 22
22.
If a mixture is uniform in composition it is said to be
Question 23
23.
Which of the following is not a chemical change?
Question 24
24.
An apple turning brown after being cut is an example of a __________ change.
Question 25
25.
Heat is applied to an ice cube. Eventually only steam is present. Draw a molecular level representaion of the process.
Question 26
26.
What happens to the size of the molecules in the above example?
Question 27
27.
What happens to the total mass of the sample?
Question 28
28.
Which of the following is a homogeneous mixture?
Question 29
29.
Which of the following would be classified as an element?
Question 30
30.
Describe (using laboratory procedure and names of equipment) how you would go about seperating a mixture of salt, sand, gravel, and water.