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Presentation on theme: "BIO-PROCESS LAB (B) 2010 KAREN LANCOUR Bio-Process Lab"— Presentation transcript:


2 Bio-Process Lab (B) Event Description - lab-oriented competition involving the fundamental science processes of a middle school biology lab program Event – lab practical in stations Event Parameters – be sure to check the rules for resources allowed, type of goggles needed.

3 TRAINING MATERIALS Training Handout – content
Event Supervisor Guide – sample stations, process skills, methods Internet Resource – links to on-line courses, lab manuals, notes, sites Sample Tournaments – sample stations with key

4 Basic Science Process Skills
Observing Measuring Inferring Classifying Predicting Communicating

5 Integrated Science Process Skills
Formulating Hypothesis Identifying Variables Defining Variables Operationally Describing Relationships Between Variables Designing Investigations Experimenting Acquiring Data Analyzing Investigations and Their Data Understanding Cause and Effect Relationships Formulating Models

6 Student Preparation Team work skills Time limits Answering questions
Measurement and Calculations Reference materials Practice using labs and lab manuels Construct sample stations

7 Compound Microscope Parts Making wet mount Appearance of objects
Movement of objects Magnification Changing objects Estimating size of objects Field diameter & area

8 Principles of Microscopy

9 Measuring objects

10 Stereomicroscope Parts Appearance of objects Magnification Advantages
Uses Observing objects

11 Electronic Balance Capacity Units Tare or Zero Err Using the Balance
Advantages & Disadvantages

12 Triple Beam Balance Capacity – auxillary weights
Units – numbered and unnumbered increments Tare Using the Balance Advantages & Disadvantages

13 Measuring Liquids Estimating Meniscus – read bottom Capacity and Range
Graduations – numbered and unnumbered increments Readability Making measurements Estimating

14 Metric ruler and calipers
Capacity and Range Numbered and unnumbered increments cm vs mm Uses of each Making measurements Estimating Vernier Scale

15 Thermometers Capacity and Range Do not start at zero
Numbered and unnumbered increments Uses of each Making measurements Estimating

16 Probes Graphing calculator Easy link or CBL Probe
Collect data onto calculator Transfer data to computer Graph analysis Quick data collection

17 Data Presentation and Analysis- Data Tables
Format Title Units of measurement Numbering Tables Source Leg (thigh) Length (cm) Time of 40 yard dash (sec) 24 9 31 9.2 37 11 38 10 39 8.2 42 8.4 55 9.3 62

18 Data Presentation and Analysis-Graphs
Graph – types X vs Y axis Scaling axis Plotting points Human Error Curve or best fit line Labeling

19 Human Mistakes vs Experimental Errors
Human Mistakes – carelessness Experimental Error – instrument variation or technique Random Error – chance variation Systematic Error – system used for designing or conducting experiment

20 A Sample Dichotomous Key
1. wings covered by an exoskeleton  go to step 2   1. wings not covered by an exoskeleton. . . . go to step 3 2 body has a round shape ladybug   2 body has an elongated shape grasshopper   3.wings point out from the side of the body . . dragonfly 3 wings point to the posterior of the body Housefly Note: There should be one less step than the total number of organisms to be identified in your dichotomous key.  

21 Sample Stations – Population Density
Measure sample area Determine population density for symbols Assign an organism to symbols Form a food chain Evaluate sample – predict techniques, etc.

22 Sample Station – Dichotomous Key
Have specimens of leaves Formulate a key or use a key to identify specimens

23 Sample Station - Measurement
Identify range, capacity, incrementation Do measurement – estimate last digit

24 Sample Station – Experiment Analysis
Analyze the design of the experiment Identify variables Explain results – form conclusions

25 Sample Station – Microscopy
Determine the diameter of the field and the length of one cell in mm and convert to mcm.

26 Sample Station – Data Analysis
Making hypotheses Food web analysis Eating habit analysis Predictions and conclusions Inferences

27 Sample Station – pH Determine the pH of various solutions using either pH probe or pH test papers.

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