# SI Units Notes

The Nature of Science

I. Scientific Method

A. State the Problem that you have observed

1. **- use 5 senses, opinion

2. **- using equipment, standard units

B. Research to Form a Hypothesis

1. is an educated guess or prediction stated in “If...then...” form

2. **- specific to general; making a general rule based on specific observations

a. most common type of reasoning, if _____ changed, then _____ would result

b. **

c. **

3. **- (general to specific) suggests something may be true of a specific case

based on general observations

a. if _____ results, then _____ must have happened

b. **

c. **

4. Forming a valid hypothesis requires background research on your topic

a. ** are a good place for current research findings

b. ** are for scientific information generally accepted by most

c. ** could help with your topic

C. Experimenting

1. a structured procedure to test a hypothesis

2. FIVE components of an experiment

a. **- (IV) the thing that “I” change or manipulate

b. **- (DV) the thing that is measured or observed, the measurement that “depends” on what we change

c. **- things we purposely keep the same throughout the exp.

d. **- group used as baseline measurement to compare other groups,

(NO TREATMENT GROUP)

e. **- redoing experiment to rule out error (bad breath)

D. Collecting and Measuring Data

1. **- (descriptive) using 5 senses, opinion

2. **- (numerical) using standard units; the metric system (SI)

a. best to use b/c it’s more accurate and reliable

b. it allows others to repeat experiments and compare data

E. Interpreting Data (constructing graphs)

1. **: The effect of (IV) on (DV)

2. **- (including units!) IV on the X-axis, DV on the Y-axis

3. ** (data w/in range, consistent interval, start at 0)

F. Draw Conclusions

1. summarize **, including analysis of data

2. discussion of problems experienced during experiment

3. discuss ** that can be made or enhancements for future exp.

~~~~~ If a question is not testable using the scientific method, then **!!! ~~~~~

SI units NotesDO the Metric Conversions Sheet below for Classwork:

The Metric System

Length, Width, Height- distance from one point to another

meter (m) (slightly longer than a yard)

Volume- the amount of space an object takes up.

liter (L) (slightly larger than a quart)

Mass- the amount of matter in an object.

gram (g)- (1g is approximately the same mass as a paper clip)

Temperature- measures the speed of molecules (hot or cold)

degrees Celcius (C)- freezing point of water 0C, boiling point of water 100C

~~~F to C use 5/9 (F -32)~~~C to F use 9/5 (C) + 32

Density- measures how packed molecules are within a certain area

{mass (g)/volume(l)}

Metric Stairs

k ____** add these letters to the blank after the prefix

(m = meter, l = liter, g = gram)

h ____** for each step UP, move LEFT

(1000 mm = 100 cm)

** for each step DOWN, move RIGHT

da ___(1.0 m = 10 dm)

m, l, g

d ____

c ____

larger than the base unit smaller than base unit

m ____

KingHenryDiedunfortunatelyDrinkingChocolateMilk

(base unit)

Metric Conversions ClassworkName: Period:

1. 12 cl = ** ml15. 1 cl = ** ml29. 4000 m = ** km

2. 11000 g = ** kg16. 6000mm = ** m30. 7L = ** ml

3. 2 L = ** cl17. 1000 L = ** kl31. 9 kl = ** L

4. 7 kl = ** L18. 30 mm = ** cm32. 3 m = ** mm

5. 4 L = ** cl19. 3 kg = ** g33. 40 mg = ** cg

6. 110 ml = ** cl20. 7 cg = ** mg34. 32 F = ** C

7. 9 m = ** cm21. 1 m = ** cm35. 57 C = ** F

8. 2 km = ** m22. 100 mm = ** cm36. -10 C = ** F

9. 800 cl = ** L23. 500 cl = ** L37. 110 F = ** C

10. 12000 L = ** kl24. 12000 ml = ** L38. 73 F = ** C

11. 90 ml = ** cl25. 5 cm = ** mm39. 80 C = ** F

12. 6000 g = ** kg26. 5000 m = ** km40. 190 F = ** C

13. 1000 cm = ** m27. 11g = ** cg

14. 2 cm = ** mm28. 8000 L = ** kl