IPS Review Worksheet
Chapter 2
Name
Date ________________
Period ______
1. Define the following:
Volume:
Mass:
2. What is the difference between mass and weight?
3. What is the difference between accuracy and precision?
4. What is the difference between a physical change and a chemical change?
5. Under “perfect conditions,” should either of these (Question 4) result in a change in mass? Explain.
6. Experiments 2.1 through 2.6 were all related to the idea of conservation of mass. Review them individually
and determine the title and what kind of reaction took place in each experiment.
Title
Kind of Reaction
Exp 2.1=
Exp 2.4=
Exp 2.5=
Exp 2.6=
7. List a common source of error for each lab and tell whether it would result in an increase or decrease in
mass.
Sources of Error
Increase or Decrease?
Exp 2.1
Exp 2.4
Exp 2.5
Exp 2.6
8. Briefly explain the Law of Conservation of Mass.
9. You want to find the mass of ice in a plastic bottle and you took the following measurements with your
balance:
Mass of empty bottle
29.56g
Mass of bottle and water
41.48g
What is the mass of the ice? _____________
What assumption did you have to make to arrive at this answer?
10. Suppose you mass a piece of modeling clay on the balance. Then you reshaped it into something else.
What will happen to the mass? Explain.
11. The mass of ice and a bottle is 36.79g before the ice melts and 36.95g afterwards. What could cause this
increase in mass?
12. An IPS student, Conservie Masse, found that when she heated copper and sulfur without a tight seal, the
mass difference was -.07g. She used 2.00g of sulfur and 1.00g of copper. What is her percent change
in mass? SHOW ALL WORK!!
13. When Conservie Masse melted a piece of ice, she calculated a difference in mass was +0.08g. The mass of
the ice was 2.35 g and the mass of the water was 2.43 g. What was her percent change in mass? SHOW
ALL WORK!!
14. 600 unit cubes were stacked 3 different ways to form the volumes of the dimensions given below. What set
of dimensions would have the greatest volume? Explain.
Set 1 = 20 x 10 x 3
Set 2 = 30 x 10 x 2
Set 3 = 40 x 5 x 3
15. a) What is the volume of an aluminum cube whose edges are 7.0 cm long?
b) What is the mass of the aluminum cube if one cubic centimeter has a mass of 2.7 g
SHOW ALL WORK!!!
16. a) Circle the following measurements that fit into the range of 35.08 +/- .02g .
35.28
35.10
35.05
35.06
35.09
b) Which of the above measurements are out of that range?
17. Calculate the following and report your answer in scientific notation. SHOW YOUR WORK!!
2
a) 7.5 x 10 + 6.9 x 10
2
b) 2.45 x 10
-4
- 2.4 x 10
-4
-3
c) 7.03 x 10 X 4.20 x 10
18. For the following set of class data:
 Round the data to the nearest .1g (only one place after the decimal),
 Create a histogram of the rounded data, and
 Write a complete conclusion based on the purpose question given and the data given.
Group
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Change
in Mass
(g)
(rounded to .1 g)
Change in Mass (g)
(+/-)
Histogram:
+0.03
-0.04
+0.01
+0.04
-0.02
-0.08
-0.01
+0.01
-0.09
-0.06
+0.00
+0.04
-0.07
+0.02
Purpose: Does the mass change when a solid and liquid combine to produce a gas?
Conclusion:
-2
19. An experiment to measure the change in mass when a substance was dissolved was conducted. Using the
following data, complete the data table below.(SHOW ALL WORK)
Mass of bottle and cap = 2.75 g
Mass of bottle, cap, sugar, and water before dissolving = 8.23 g
Mass of bottle, cap, sugar and water after dissolving = 8.26 g
Mass of
Container
(g)
Mass of
ENTIRE
System
BEFORE (g)
Mass of
Reactants
(g)
Mass of
ENTIRE
system
AFTER (g)
Mass of
Products (g)
Change in
Mass (g)
% Change in
mass
20. a) Define the phrase “Law of Nature”.
b) Give an example of a “Law of Nature”, other than the Law of Conservation of Mass AND explain how it
fits the definition from part a)
21. Why is mass a better way of comparing amounts of matter than volume?
22. Why is mass a better way of comparing amounts of matter than weight?
23. Why is a change in mass of up to +.04g considered to be not a significant change in mass?
24. A grad is filled with 26.2 mL of water. The water is found to have a mass of 26.2 g. The water is poured in
to an ice cube tray and is frozen. A student quickly measures the dimensions of the cube and each side
measures 3 cm long. The cube is quickly re-massed and is found to be 26.2 g.
What happened to the mass as the water is frozen?
What happened to the volume?