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Laboratory Section |
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Contents of this page:
- Wear goggles at all times when working in the lab. Label goggles if you are wearing contact lenses.
- Students must work with their assigned lab partner at their designated station.
- No drinking, eating, or chewing gum in the laboratory.
- Horseplay or practical joking is not allowed.
- Dress appropriately on days when laboratory work will be done. Sandals or loose clothing or jewelry should not be worn.
Confine or securely tie hair away from your face. Remember, hair is flammable.
Chemicals on the skin or in the eyes should be washed off immediately with plenty of water.
- Report all accidents to the teacher, no matter how minor.
Never taste any chemicals in the laboratory. Use wafting motion to test odors.
Exercise extreme caution when using the gas burner. Keep your hands, arms, clothing, and head away from the flame. Be careful not to put burner under cabinets. Flames should be tended at all times. Students having long acrylic nails should not operate gas burner.
- Do only the experiment assigned by the teacher.
Point the open end of a test tube which is being heated or mixed away from other students.
- Be prepared for the laboratory activity. Follow all cautions and safety considerations.
- After all lab activities, clean glassware. Return materials to the supply table. Leave sink and lab area free of spills and debris.
Dispose of excess chemicals as directed. Do not return them to the main reagent supply bottle.
STUDENT SAFETY CONTRACT
I, ____________________ a student in science at Spring Valley High School, do hereby agree to follow all safety rules and regulations as set forth by the instructor. I realize that compliance with these rules is necessary to assure the safe operation of the school laboratory and provide safe environment not only for myself, but for my fellow students and teachers as well. I will therefore, cooperate fully with the teacher and students to assure all of us the safest laboratory possible. I will act responsibly to look for possible safety hazards, and will immediately point out these hazards to the instructor. I realize that, as a student, much of the responsibility for safety is in my hands. I have read the attached rules and will comply with them to the best of my ability. I understand that violation of these rules may result in the loss of laboratory privileges and possible disciplinary measures.
Signed____________________ Date____________________
Student
Lab Report Format
Name
Date
Class
Instructor
Lab Report Format
1. Purpose: WITH TITLE, FORMAT WORTH 5 POINTS TOTAL
One or two sentences explaining WHY you were to perform this lab.
2. Materials: 5 POINTS
Include what a student would need to complete this investigation. Be specific, thorough. May include a diagram/drawing of apparatus if clarification is needed
3. Procedure: 5 POINTS
In 3rd person (NO "I", "YOU", "WE", etc), describe step-by-step what was done to carry out the lab. Write in such a way that another student could complete this experiment by following your procedure.
4. Data: 10 POINTS
In tabular form, present both qualitative and quantitative results in an organized, easy-to-follow format. This section must include the following:
- All measured values with appropriate units
- All calculated values with appropriate units
- Any relevant observations made during the investigation
5. Calculations: 10 POINTS
For all quantitative results that were calculated, show how those values were obtained in this section.
- If a formula or equation was used, make sure to include it as well.
- Show all steps followed in determining your result.
- Box answers, showing the correct number of significant digits, with appropriate units.
6. Conclusions: 10 POINTS
This, the most important section of the report, is a place where you summarize, analyze, reflect on and show understanding of what you did in the investigation. Be sure to include:
- A summary of the procedure in 2-3 sentences
- A discussion of your expectations (what you might observe, what your results would be, what problems you might encounter) prior to the investigation and in what ways were your expectations met or not met. Minimum 3-4 sentences
- A discussion of your results, in written form as compared to tabular form in the DATA section. Include an account of the accuracy and precision of your results, as well as quantitative and qualitative comparisons of experimental to accepted values
- At least two sources of error, NOT INCLUDING human error, which had an effect on your results, and how those sources affected the results
- At least two significant concepts, ideas, techniques, etc that you learned or were reinforced during this investigation
NOTE: THIS IS JUST A SAMPLE LAB REPORT. YOUR REPORT MAY BE DIFFERENT IN SEVERAL WAYS. THIS IS NOT NECESSARILY AN "A" PAPER… MR. RUSHTON
To practice using laboratory instruments to measure both accurately and precisely.
Meter Stick
100mL-graduated cylinder
Plastic funnel
Thermometer
| Height of Door | 8,375 cm |
83.75 m |
.08375 km |
| Length of desk | 44.3 cm |
.443 m |
|
| Width of desk | 59.5 cm |
.595 m |
|
| Area of desk | 2635.85 cm ² |
.263585 m ² |
|
| Vol. Single hand cup | 12,000 mL |
12 L |
|
| Vol. Double hand cup | 42,000 mL |
42 L |
|
| Temp. of hand | 34°C |
93.2 °F |
307.15K |
Calculations:
CONVERSIONS:
| 83.75 m x 100 cm/1m = 8,275 cm 83.75 m x 1 km/1000m = .08375 km |
| 44.3 m x 100 cm/1m = 4,430 cm 59.5 m x 100 cm/1m = 5,950 cm |
| 12 L x 1,000 mL /1L= 12,000 mL 42 L x 1,000 mL/1L = 42,000 mL |
| AREA: 44.3 * 59.5 = 2,635.85 m² 4,430 cm² * 5,950 = 26,358,500 cm² |
| TEMP CONVERSIONS: (34 * (9/5)) +32 = 93.2°F |
| 34 + 273.15 = 307.15 K |
The procedure for this lab is to walk around the classroom and then find the measurement of an object around the classroom. Then use your conversion process to find the same value but in different measurement.
The expectation I had before starting this lab is to get to know the standard lab rules and regulations. Also I expected to learn how to use the basic lab equipment.
My expectations were all met. I got to learn the basic laboratory procedures along with the basic lab equipment.
The height of the door was 8.375 cm, 83.75 meters and 83, 750 km high. Then the area of the desk was 2458.65 cm² or 263585 m². Then the volume of my single hand cup was 12,000 mL or 12 L and my double hand cup was 42,000 mL or 42 L. Then the temperature of my hand after holding the thermometer for two minutes was 34°C or 93.2°F or 307.15K.
My accuracy and precision of my result was good except for the had cup results. There, it was not very accurate due to me spilling water and missing the funnel.
Two sources of error that could have changed my results is the ruler could have been worn down at the end or there could have been a leak in the funnel. This could have affected our results by not giving me a very accurate result.
I learned how to use the metric conversion method. Also, I re-enforced my skills in teamwork.
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