1. Chapter 1: The Study of Change
Dr. Nouf Alotaibi

2. Which of the following would NOT be a physical change?
freezing water to make ice cubes.
melting gold to make jewelry.
burning a piece of paper.
tearing a piece of aluminum foil.
Which of the following would be a chemical change?
perfume evaporating on your skin.
melting butter for popcorn.
burning sugar. 
a hot glass breaking when placed in cold water.

3. Which of the following is an example of a physical property?
A) Combustibility
B) Corrosiveness
C) Explosiveness
D) Density
Which of the following would NOT be an extensive property?
volume of a substance in beaker.
mass of a soccer ball.
boiling point of water.
length of a class room.

4. What is the SI unit of mass?
A) Meter
B) Centimeter
C) Gram
D) Kilogram (kg)
The symbol for density in SI system is:
m3/s kg
kg/m3
g/ml

5. Convert 240 K and 468 K to the Celsius scale.
A) 513oC and 741oC
B) -59oC and 351oC
C) -18.3oC and 108oC
D) oC and 295oC

6. Calculate the volume occupied by 4. 50 X 102 g of gold (density = 19
Calculate the volume occupied by 4.50 X 102 g of gold (density = 19.3 g/cm3).
A) 23.3 cm3
B) 8.69 x 103 cm3
C) 19.3 cm3
D) 450 cm3
The melting point of bromine is -7 oC. What is this melting point expressed in oF?
A) 45 oF
B) -28 oF
C) -13 oF
D) 19 oF

7. The number of significant figures in 0.053 is1 4 2
 What is the Scientific form for 3,500,000,000
3.5x109
3x109
3.5x108
3.50x109

8. How many significant figures are there in the measurement 3.4080 g?
B) 5
C) 4
D) 3
E) 2
Multiply (4x 105) (6.2x107)
2.48 x 1013

9. 3.57096 x 105 5.600 x 10-3 Convert 357,096 to Scientific Notation

10. Given: 2.46 x x 103
Shift decimal 3 places to the left for 103.
Move: x 103+3
Add: 2.46 x x 106
Answer: x 106

11. Given: x 103 – 2.65 x 10-1
Shift decimal 4 places to the right for 10-1.
Move: x 10(-1+4)
Subtract: x x 103
Answer: x 103

12. 5.4 x 106
Evaluate:
9.0 x 102
5.4 ÷ 9.0 = 0.6
106 ÷ 102 = 104
0.6 x 104
6.0 x 103
1. Divide the coefficients
2. Divide the powers of ten
3. Combine those results
4. Put in proper form

13. Practice Rule #1 Zeros 6 3 5 2 4
All digits count
Leading 0’s don’t
Trailing 0’s do
0’s count in decimal form
0’s don’t count w/o decimal
0’s between digits count as well as trailing in decimal form
48000.
48000
3.982106

14. Addition and Subtraction
Look for the last important digit
.71
82000 .1
= .713 = =
10 – =
__ ___ __

15. Multiplication and division
32.27  1.54 =
3.68  =
1.750  =
3.2650106  =  107
6.0221023  1.66110-24 =
49.7
46.4
.05985
1.586 107
1.000