Lab reports And how to write them.

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Presentation transcript:

Lab reports And how to write them

Parts of a lab report Purpose: Materials: Procedure: Data/Observations: Calculations/Analysis: Questions/Conclusion: *yes, use the words as section headers

Purpose The purpose of this lab was to… Include 3-4 sentences of background information that explain the science behind the experiment If there is a hypothesis it goes here

Materials If you used it, then you must list it here. Items can be bulleted, no need for paragraphs Safety concerns are listed here too. EXPLAIN THESE!

Procedure A procedure is always written as a paragraph. It is NOT bulleted. It is written in past tense, without the use of I, we, you, he, she etc… DON’T: I lighted the bunsen burner DO: The bunsen burner was lighted. Tell us what YOU did, not what you were supposed to do. Some of the greatest discoveries occurred by accident

Data/Observations Whatever data was recorded as you performed your lab will be re-written here. Use tables and charts, label everything completely

Calculations When calculations are needed they MUST be explained An example of the formula you will use is written first Every calculation is performed on a separate line neatly and clearly EX: Denisty (g/mL) = Mass (g) / Volume (mL) Densitysample 1 = 25.0 g / 5 mL = 5 g/mL

Analysis If you are asked to identify an “unknown” it would appear in this section. Ex: Unknown #1 – appeared Blue-green in color, based on the colors recorded in Data section this allows us to conclude unknown #1 must be copper (this is NOT the answer for our flame test lab unknown #1)

Questions If you were asked to answer questions as a part of your lab, they should appear here. Re-write the question and provide answer OR re-phrase the question as a part of your answer. Answers without context will receive deductions. Remember, anyone should be able to understand your lab report even if they never did the lab.

Conclusion Remind your audience, what were you trying to do? What was the purpose? Here is where you comment on successes and failures, be sure to highlight major learnings. We used flame tests to identify unknowns… OR… We attempted to use flame tests but my lab partner went crazy and set the lab on fire, we will need to try again tomorrow…