GATHERING AND REPORTING QUANTITATIVE DATA

Question 1

where individual values are assigned a descriptive category

Answer 1

Qualitative

Question 2

where the individual values are described on a numerical scale which may be either (i) continuous, taking any value on the measurement scale, or (ii) discontinuous (or discrete), where only integer values are possible

Answer 2

Quantitative

Question 3

typically under the control of the experimenter

Answer 3

independent variable

Question 4

variable being measured

Answer 4

dependent variable

Question 5

is the degree of agreement between the
measured value and the true value.

Answer 5

accuracy

Question 6

signifies the smallest quantity that the instrument could be sensitive to or is able to detect.

Answer 6

precision

Question 7

a convenient way of expressing very large and very small numbers

Answer 7

scientific notation of a value

Question 8

A. Rewrite the following numbers in scientific notation, in simplest form. Include units. Use appropriate significant figures! (1 pt each)

EXAMPLE: Number of galaxies in the universe: 1 trillion galaxies = 1 x10 12 galaxies

1. Thickness of a human hair: 0.015 cm =
2. Volume of a hydrogen atom: 0.000 000 000 000 000 000 000 000 621 cm3 =
3. Average height of Filipino men: 163.22 m =
4. Diameter of Earth: 12, 742 km =
5. Age of the solar system: 4571000000 billion years =

Answer 8

1.5 x 10^-2 cm
6.21 x 10^-25 cm^3
1.6322 x 10^2 m
___
4.571 x 10^9 billion years

Question 9

B. Perform the following unit conversions: (2 pts each)
1. 45 µg = mg
2. 45µg = ng
3. 45µg = kg
4. 550 nm = km
5. 6328 Å = nm (Note: 1 Å = 10–10 m)
6. 1 m2 = cm2
7. 1 km2= mm2
8. 200 cm3 = mL (Note: 1 m3 = 1000 L)
9. 15 psc= ns
10. 100. km/h = m/s

Question 10

How many significant figures are represented in each of the following numbers? (1 pt each)
a. 579.420 =
b. 3.14159265 =
c. 2 × 1011 =
d. 50.1 =
e. 3800 =
f. 5.60 × 1048 =
g. 243.0 =
h. 9.0000 × 10–9=
i. 0.0000030 =
j. 8 =

Answer 10

6
9
1
3
2
3
4
4
5
2
1

Question 11

0.0034 cm significant figure?

Answer 11

2

Question 12

1.000 m significant figure?

Answer 12

4

Question 13

0.000200 cm significant figure?

Answer 13

3

Question 14

800 g significant figure?

Answer 14

1

Question 15

20.000 km significant figure?

Answer 15

5

Question 16

8.50 x 10^2 s significant figure?

Answer 16

3

Question 17

3.641 x 10^-1 min significant figure?

Answer 17

4

Question 18

55000 kg significant figure?

Answer 18

2

Question 19

48 Quezon Avenue significant figure?

Answer 19

not a significant figure

Question 20

12:00 a.m. significant figure?

Answer 20

not a significant figure

Question 21

In addition, and subtraction, the answer must contain the same number of digits to the right of the decimal point as that term containing the ______________ to the right of the decimal point.

Answer 21

least number of digits

Question 22

In multiplication and division, the answer must contain the same number of significant figures as that term with the _______________ of significant figures.

Answer 22

fewest number