1. Safety Wear closed shoes that cover foot.
Do not prop door open, must remain closed.
NO FOOD OR DRINK in the lab.
No children in the lab.

2. Lab equipment: 2. 1.

3. 3. 4. 5.

4. 6. 7.
Images from Jeff Beck

11. Unit 1 Measurement
Pages 11-27

12. Metric System Basic units Based on ten
Length-meter
Mass-gram
Volume- liter
Based on ten
Prefixes used to modify the base

13. Metric Prefixes Kilo (k) Hecto (h) Deka (da)
1000 X base unit (103 X base unit)
Hecto (h)
100 X base unit (102 X base unit)
Deka (da)
10 X base unit (101 X base unit)

14. Metric prefixes Deci (d) Centi (c) Milli (m)
1/10 X base unit (10-1 X base unit)
Centi (c)
1/100 X base unit (10-2 X base unit)
Milli (m)
1/1000 X base unit (10-3 X base unit)

15. Less commonly used prefixes
Tera 1012
Giga 109
Mega 106
Micro 10-6
Nano 10-9
Pico 10-12

16. Conversions within metric system
Because system is based on 10, conversions are made easy by using a shorthand line chart

17. Base Unit
kilo
hecto
deka
deci
centi
milli

18. Base Unit kilo hecto deka deci centi milli Convert 54.56 cm to km.
To convert, move decimal point 5 places to the left.
Base Unit
kilo
hecto
deka
deci
centi
milli
Answer: km

19. Base Unit kilo hecto deka deci centi milli Convert 0.1 km to meters
To convert, move decimal point 3 places to the __?___.
Base Unit
kilo
hecto
deka
deci
centi
milli
Answer: 100 m

20. Base Unit kilo hecto deka deci centi milli
Convert 20 centigrams to dekagrams.
To convert, move decimal point 3 places to the ____.
Base Unit
kilo
hecto
deka
deci
centi
milli
Answer: 0.02 dag

21. Base Unit Giga Mega hecto deka deci centi milli micro nano kilo
Notice that there are 3 spaces on the number line between Giga and Mega.
Base Unit
Giga
Mega
hecto
deka
deci
centi
milli
micro
nano
kilo

22. Base Unit Giga Mega hecto deka deci centi milli micro nano kilo
Notice that there are 3 spaces on the number line between Giga and Mega.
Convert 1,800,000 kilometers to gigameters.
Move decimal ____ places to the ______.
Base Unit
Giga
Mega
hecto
deka
deci
centi
milli
micro
nano
kilo
Answer 1.8 gigameters

23. Scientific Notation (p 23)
Uses powers of 10 so that very large or small numbers can be expressed concisely.
100 =1
103= 1000
10-5 = 1/ or
Each time the exponent power is increased by 1, we are really multiplying by 10.
Each time the exponent power is decreased by 1, we are dividing by 10.

24. Express 800,000 in scientific notation.
Place 1 digit in front of the decimal point and multiply by the correct exponent.
Answer
8 X 10 5
Express 80,055 in scientific notation.
X 104

25. Scientific Notation Express 0.000993 in scientific notation.
Place one digit in front of the decimal point and multiply by the correct exponent.
Answer
9.93 X

26. English to Metric Conversions p 18
Convert 25 degrees Celsius to degrees Fahrenheit.
Use one of these formulas (which one?)
C= 0.55 (F - 32)
F= 1.8(C) + 32
F = 1.8 (25) +32

27. English to Metric Conversions
A patient in a doctor’s office weighs 200 pounds. How may kg does this patient weigh?
1 kg = 2.21 pounds (see p 27 for conversions)
Multiply by a conversion factor which will have the same result as multiplying by one.
1 kg
= kg
200 pounds
2.21 pounds

28. Special Instructions for Unit 1
Homework assignment will be given at end of class.
Check-out procedure: Graphing Exercise and hypothesis for your groups’ mealworm experiment.

29. III. Length Measurements
I. Metric Units
Read
II. Metric Conversions
Do Exercise 1.1 Practice Conversions (can do at home.)
III. Length Measurements
Read and do Exercise Do some measurements but it is not necessary to do them all.
You need to do the measurement of a dime on p. 14.

30. IV. Volume V. Mass Read and do all exercises
Everyone should practice using a pipet
V. Mass
Note: 1 cc = 1 ml = 1 g (Must remember this!)

31. VI. Temperature VII. Stat analysis
Take readings in Celsius of temps of water at station in back. The incubator in the gray box in the back corner
Do C to F conversions
VII. Stat analysis
Skip this section

32. Graphing data Exercise 1.7 (p 22)
Follow instructions on proper labeling of graph and graph data given in table. (CAN COMPLETE AT HOME)
VIII. Sci Notation
Read and do exercise (can complete at home)
IX. Medical importance
Do medical calculations (can complete at home)
Lab Questions p25-26
Can complete at home
Some quiz questions may be taken from these.

33. Scientific Method
Unit 2

34. Mealworm or Tenebrio molitor
We will set up the scientific method experiment today and will work on it for the next 2 weeks.
Mealworm or Tenebrio molitor
Weigh mealworm this week
Place in one of 2 substrates
Oat bran or peat moss
Reweigh next week
Do statistical analysis of data (weight gain or loss) to determine which substrate best supported growth of the mealworm

35. Independent variable Dependent variable Control variables
What the investigator varies
Type of substrate
Dependent variable
What is measured or counted
Change in mass of mealworm
Control variables
Amount of water, amount of substrate, light conditions, others

36. Review Scientific Method Terminology
Hypothesis
Steps on scientific method
Discuss with your lab group a valid hypothesis for your mealwork experiment.

37. Scientific Research Articles
Scientists must publish their research in a peer-reviewed journal for the information to be a part of scientific knowledge.
Your lab reports will be similar to these research articles and will contain the following 5 sections.
Abstract
Introduction
Materials and Methods
Results
Discussion

38. Research articles