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.
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.
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.
Question 9
9.
Name two intensive properties in this experimnet describing the product?
Question 10
10.
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.
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.
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.
Question 21
21.
Question 22
22.
Question 23
23.
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.
Question 29
29.
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.
When one substance was added to the other substance, was there a physical change or chemical change?
physical change
chemical change
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?
Increase
Decrease
Stay the Same
When one substance was added to the other substance, was there a physical change or chemical change?
Physical Change
Chemical Change
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?
Increase
Decrease
Stay the Same
When one substance was added to the other substance, was there a physical change or chemical change in "Part 3" video?
physical change
chemical change
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?
increase
decrease
stay the same
An atom is
the smallest unit of matter that maintains its identity
the smallest unit of a compound that can vary in identity
always made of carbon
smaller tahn an electron
Which of the following is NOT a physical change?
grinding
cutting
boiling
burning
If a mixture is uniform in composition it is said to be
homogeneous
heterogeneous
chemically bonded
a compound
Which of the following is not a chemical change?
rusting
melting
burning
tarnishing
Which of the following is a homogeneous mixture?
distilled water
sandy sea water
lake water with algae
a glass of ice and water
Which of the following would be classified as an element?