Unit 1 Study Guide
Name ________________________________________ Date ______________________
Scientific Method Notes
1) What is the difference between an observation and an inference?
2) What are the two types of observations? Give examples of each type.
3) Define the following:
o Independent variable:
o
Dependent variable:
o
Control variable:
o
Control group:
o
Accuracy:
o
Precision:
4) What makes a measurement tool more accurate?
5) Identify the variables in the following experiments
Three redwood trees are kept at different humidity levels inside a greenhouse for 12 weeks. One tree is left
outside in normal conditions. Height of the tree is measured once a week.
IV: ____________________________________
DV: ____________________________________
CG: ___________________________________
Constants: _____________________________________
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were
added before each test flight. As each paper clip was added, the plane was tested to determine how far it would
fly.
IV: ____________________________________
DV: ____________________________________
CG: ___________________________________
Constants: _____________________________________
6) Measure the following amounts to the correct number of significant figures
Significant Figures Study Guide
Name __________________________ Date __________________
Set A: Determine the number of significant digits in each number and write the number in scientific notation.
1. 2605.40 __________________________________
8. 9.0 ______________________________________
2. 10, 733 __________________________________
9. 2.36 _____________________________________
3. 0.00420 __________________________________
10. 7_______________________________________
4. 990. _____________________________________
11. 7.00 ____________________________________
5. 325 _____________________________________
12. 52,000 __________________________________
6. 0.0004 ___________________________________
13. 8000 ___________________________________
7. 3000.0 ___________________________________
14. 325.00 __________________________________
Set B: Round to the number of significant digits indicated.
1. 5.67498 to 1 sig. fig. ________________________
6. 49.0385 to 3 sig. fig. ________________________
2. 0.04102 to 3 sig. fig. ________________________
7. 0.00794 to 1 sig. fig. ________________________
3. 2.998 to 2 sig.fig. __________________________
8. 0.006008 to 3 sig. fig. _______________________
4. 26, 384 to 2 sig. fig. ________________________
9. 825,066 to 1 sig. fig. ________________________
5. 37.446 to 3 sig. fig. ________________________
10. 30.0026 to 4 sig. fig. ______________________
Set C: Multiply or divide as indicated. Round the final answer to the appropriate number of significant digits.
1. 27.3 X 4.5 _______________
6. 4000 ÷ 23 _______________
11. 0.009 ÷ 7 _______________
2. 4.68 X 400 _______________
7. 30.0 X 25.00 _____________
12. 6.14 X 30.5 X 500. ________
3. 323 X 0.0002 _____________
8. 4.1 X 6.22 X 5.478 _________
13. 30,000 ÷ 3.004 ___________
4. 4008 ÷ 2.763 _____________
9. 32 ÷ 5 _______________
14. 7.0000 X 0.003 ___________
5. 69 ÷ 7.0 _______________
10. 4008 ÷ 3.0 _____________
Set D: Add or subtract as indicated. Round to the appropriate number of decimal places.
1. 5.72 + 2 _______________
6. 67.45 – 12.2 _____________
11. 75.0006 – ϯ͘ϰϮоϴͺͺͺͺͺͺͺͺ
2. 500 – 79.4 _______________
ϳ͘ϭϯ͘ϳϬϴоϰͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ
12. 4005.2 + 0.6659 _________
3. 0.006 + 0.04 _____________
ϴ͘ϳϲ͘ϲϮнϮϯ͘ϮϰϱоϰϬ͘ϭͺͺͺͺͺͺͺ
13. 20,623.1 – 839.54 + 11.8 ___
4. 84.3 – 0.009 _____________
9. 64 – 3.88 _______________
14. 0.00516 + 0.003__________
5. 66.3 + 27.008 _____________
10. 5.05 + 6.2 + 3.89 _________
Dimensional Analysis Worksheet 2
Name:
Period
Date
Use dimensional analysis (the “factor-label” method) to solve the following problems. Show all steps
needed to convert from starting units to ending units. Indicate all relationships needed before setting
up and solving the problem. Use any of the following relationships if needed:
1 mile = 1760 yds
1 yd = 3 ft
1 ft = 12 in
1 mile = 1.6093 km
16 oz = 1 lb
2000 lbs = 1 ton
1 oz = 28.35 g
1 kg = 2.205 lbs
1 L = 1.057 qts
4 qts = 1 gal
32 oz = 1 qt
1 qt = 2 pts
1 day = 24 hours
1 hour = 60 mins
1 min = 60 secs
1. A runner competed in a 5-mile run. How many yards did she run?
2. In the Tour de France, cyclists ride 3,653.6 km in 20 days. How many miles do they go? [Hint:
watch for unimportant information!]
3. After a nice meal, perhaps you’d finish it off with a pound (1.00 lb) cake for dessert. What would the
name of this cake be in grams?
4. In the US milk is sold by the gallon, while in Denmark it is sold by the liter. How many liters of milk
would you need to equal one gallon?
5. If you go to school for 180 days each school year and each school day is 7 hours long, how many
hours are spent in school in one school year?
Turn over!
Metric Measurement Conversion
Instructions: Use the prefix conversion chart on page 2 of your reference packet to complete the
following metric equalities.
kg =
g
cm =
m
mm =
m
ms =
km =
kL =
m
L
cL =
mg =
L
g
mg =
mL =
g
L
Mg =
s
g
Use the prefix conversions chart and dimensional analysis (don’t simply “move the decimal point”) to
convert the measurements below as indicated. You can use scientific notation for very large or small
numbers.
1) 40 mL to L
11) 7870 mL to L
2) 5400 L to kL
12) 6.42 m to mm
3) 85 g to kg
13) 1850 cm to m
4) 52 mg to g
14) 11.4 km to m
5) 6300 m to km
15) 3 m to mm
6) 2.50 kg to g
16) 25 Mg to g
7) 18,600 g to kg
17) 74 cm to mm*
8) 544 mL to L
18) 835 mg to kg*
9) 1.92 L to mL
10) 425 cm to m
*two-step conversions