TEMS SCIENCE 8
TEMS SCIENCE 8
PRINCIPLES OF SCIENCE
PART ONE: DIMENSIONAL ANALYSIS
Example one:
55mm= _____ m
55mm__ ___1m___ = 0.055m
1. 1000mm
Example two:
88km = _____m
88km_ __1000m_ = 88,000m
1. 1km
Example three:
25km/h = _______ m/s
25km___ 1000m___ ___1h___ ___1min___ = 69m/s
1h 1km 60min 60s
Problems to Solve: (refer to the conversion chart provided)
1. Suppose a bug is 7 inches long. What is it’s length in feet?
.583 in
2. Express a length of 1225 feet in miles.
.232 miles
3. Express 7650.74 inches in miles.
.120 miles
4. How many seconds are there in 82 minutes?
4920 minutes
Practice Problems:
1. 12.5 kg = _______ g
12,500 g
2. 1525 cm = _______ m
15.25 m
3. 16 min = _______hr
.26 hr
4. 27.25 mL = ___27.25___ cm3
TRICK QUESTION! 1ml=1cm^3 because 1 dm^3= 1 L (think about the sugar cubes, rubix cube, and soda bottle)
5. 25 qt = _____ L 23.58
Metric Conversions
1. Write the prefixes for the metric system in order with the biggest on the left to the smallest on the right.
CHECK IN NOTES
2. 44.8 m = __________mm 44800
3. 67 cm = _________m . 67
4. 43 kg = _________g 4300
5. 9.8 cm = _________mm 98
6. 78 L = _________mL 78000
7. 57.2 mg = ________g .0572
8. 4.7 km = _________m 4700
9. 578 mm = _________cm 57.8
10. 9.7 L = ________mL 9700
PART TWO: SCIENTIFIC METHOD
4. Match the following:
5.
E_____ Hypothesis
_D____ Observation
__B___ Conclusion
___F__ Controlled Experiment
____C_ Construct a Theory
_____G Communicate with others
_____A Collect and Analyze Data
a. construct model or chart to illustrate data.
b. Hypothesis supported or rejected
c. Highly tested, accepted principle based on facts.
d. The act of noticing and describing events or processes in a careful, orderly way
e. A scientific explanation for a set of observations that can be tested.
f. An experiment where only ONE variable is changed.
g. Publish the results
7. What is the difference between an “Observation” and “Inference”?
Observation-purely objective (you are just reporting what is seen) Inference-observation + your thoughts
8. Give an example of an “Observation”.
3 mice died
9. Give an example of an “Inference”.
3 mice died because they drank anti-freeze
10. List the parts of the Scientific Method:
a. _____Problem_________________
b. _____Research__________
c. ____ Hypothesis__________
d. _____Experiment________
e. _____Analysis_________________
f. _____Conclusion _________________
11. Read the following experiment and complete letters a through d:
The Krusty Scenario
Krusty was told that a certain itching powder was the newest best thing on the market. It even claims to cause 50% longer lasting itches! Interested in this product, he buys the itching powder and compares it to his usual product. One test subject (A) is sprinkled with the original itching powder, and another test subject (B) was sprinkled with the Experimental itching powder. Subject A reported having itches for 30 minutes. Subject B reported to have itches for 45 minutes.
a. Identify the Control Group
the group receiving the original powder
b. Identify the Independent Variable
both powders are IVs
c. Identify the Dependent Variable
itching time
d. Explain whether the data supports the advertisements claims about its product.
The data supports the advertised claims because the experimental itching powder lasted an extra 15 minutes longer, which happened to be 50% of the original powder time of 30 minutes.
PART THREE: SCIENTIFIC NOTATION
Convert each number in decimal notation to scientific notation:
1. 650,550 = _____2.5055 x 10^5__________________
2. 9,260 = __________9.26x 10^3_____________
3. .00826 = _________8.26 x 10^-3______________
4. .00000231 = _________2.31 x 10^-6______________
5. 124 = ________1.24 x 10 ^ 2 _______________
Convert each number in scientific notation to decimal notation:
1. 6.42 x 106 = _________6420000______________
2. 4.33 x 10-3 = _______.00433________________
3. 8.72 x 103 = ________8720_______________
4. 3.14 x 10-2 = ________.0314_______________
5. 1.12 x 107 = _______11200000________________
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STUDY GUIDE
2013 2014
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