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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size

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