Wednesday, March 12th and Thursday, March 13th In Class Demonstration Lab ReportUse the information below to help you complete your lab report that is being done in class.

Lab Title- Conductivity of LiquidsState the Problem-
The purpose it to test what liquids conduct electricity the best.
Independent Variable- Type of liquidDependent Variable- Amount of electricity conductedHypothesis- If we test the conductivity of different liquids (orange juice, water, salt water, vinegar, lemon juice, and Mt. Dew), then the _ will conduct the most electricity because _. Control- Amount of electricity trying to be conducted, tester, ohm meterMaterials- Orange juice, water, salt water, vinegar, lemon juice, Mt. Dew, light bulb conductivity tester, 6 breakers, ohm meterProcedure- 1. Prepare light bulb tester
a. Using electrical tape, take one end of wire to battery, and one end of same wire to light bulb.
b. Tape one end of another wire to light bulb and the other end of Popsicle stick wrapped in aluminum foil
c. Tape one end of another wire to other output of battery, connect other end of wire to Popsicle stick covered in aluminum foil
2. Pour each of the testing liquids in beakers. Be sure there is the same amount of each liquid in beaker
3. Place both end of light bulb tester into the liquid and be sure they do not touch
4. Check to see if the light bulb turned on.
5. If light bulb turns on, leave the light bulb tester in the liquid and place both end of Ohm Meter in the liquid, being sure not to touch the Ohm meter to anything other than the liquid
6. record number shown on ohm meter.
7. Repeat steps 3-6 with each liquid


Middle School Science Lab Report Format

Your lab report should represent organization, neatness and professionalism. This word-processed report is expected to be single spaced, using 12-point Times New Roman or Tahoma font.

Creative cover page: Title is typed with large clear lettering and centered on the page. Include a picture that represents your project (either printed in color or printed in b/w and colored nicely). Your name, hour, teacher, and date, should be in the lower right-hand corner of the page.


A) This section explains the purpose of doing this lab.

Ex. The purpose of this
_ lab is to…

B) It is here that you give background information on the general topic that the lab is studying

to help a reader ofyour lab report to understand the problem. You may need to refer to your textbook, notes from the teacher, library books, credible Internet sources, etc. Include as much as you can find that is relevant to the topic. *Keep track of all sources for your bibliography.

Experimental Design__

  1. The experimental question/problem that accurately states what is being investigated. What

is the question you are going to answer? The problem should be stated as clearly as possible and written as a question that cannot be answered with “yes” or “no.”

  1. The independent variable. The variable that you are going to alter or change throughout

your experiment, identified after the word “if” in your hypothesis.

  1. The dependent variable. The variable that you are measuring, identified after the word

“then” in your hypothesis. Also, note the operational definition of how you will measure your dependent variable (time in seconds, distance in meters, etc.).

  1. The control. What are you using for a comparison? The control condition can be thought of

as the “baseline” or “normal” condition.

III) Hypothesis

The hypothesis suggests an answer to the above experimental question. It is an educated, scientific guess taking into consideration the background information you researched, prior knowledge or evidence that you have.

You write a hypothesis in the if/then/because format.

If…(independent variable), then…(dependent variable), because….a reason for your prediction.

Ex: If different types of racquetballs are dropped, then they will bounce to different heights, because they are made of different materials.

IV) Materials

This section contains a bulleted list of materials you used. Be sure to give the sizes of beakers/cylinders used, quantities of items. Be specific and descriptive with every item.

V) Procedure

This section is a list of numbered steps in the order that you took to complete the lab. The reader should be able to use this section to duplicate your experiment exactly. Your description should be detailed, concise and specific. Write in complete sentences (starting with a verb and ending with a period) and list exact quantities and techniques.

V) Observations