Dependent Variables Lab Report

water during the equilibration period of 10 minutes. Vials 1,2, and 3 should be in the bath containing water at

There are several parts to the experiment such as both the independent and dependent variables. The independent variable is controlled or changed during the experiment to test the effects on the dependent variable. The dependent variable is tested and measured during the test .A controlled variable is an example for an independent variable would be variable that is held constant throughout the experiment. An example is a theory that could extend a person’s life expectancy. The independent variable is the amount of vitamin given to the subject within the experiment. The dependent variable is the life span

3. We poured tube 1 with the solution in tube 3 to combine them. We repeated this for all of the tubes. Each of the tubes in step 1 was mixed with a tube in step 3, making there be 6 total test tubes with a solution in it.

We first started this experiment by obtaining twelve 15ml test tubes, in which we placed in a rack and labeled each with what

The independent variable for the experiment was the paper towels. The dependent variable was the absorbency and strength. The constants for the experiment were the size of the paper towels that were used, the amount of water, the size of the beaker, the size of the cylinder and the amount of the weight.

tube was placed inside, then another test tube with an equal amount of substance would be placed

The independent variable of this experiment are the environmental factors that you are testing on the rate of transpiration, so our independent variables would be bright light, fan, dark, and misted. The dependent variable is the rate of transportation because this depends on whatever environmental factor the plant is placed. The constants were things like the type of plant we used, the room temperature, the type of scale we used and how far the fan/light was placed from the plant.

The vials were placed in the water and the oxygen levels were read every 5 minutes until 30 minutes was reached. As the oxygen levels were collected they were put into a table that had all three tubes labeled at each 5-minute increment. After 30 minutes the experiment was completed and the clean up process could begin.

Using a thermometer we observed the measurement of the water “H2O” in the beaker, and it resulted in an initial temperature of 20 ⁰ C.

The dependent variable refers to the status of the 'effect '(or outcome) in which the researcher is interested; the independent variable refers to the status of the presumed 'cause, ' changes in which lead to changes in the status of the dependent variable…any event or condition can be conceptualized as either an independent or a dependent variable. (Rosenthal & Rosnow, 1991).

14. The experiment was repeated with each water temperature until all tests had been conclusively completed.

Place the beaker on the hot plate, place the thermometer in the beaker and set the hot plate to 5oC.

The independent variable is sugar concentration. This will be changed by using solutions with different amounts of sugar (2%, 6%, 10%).

Half of each tube’s contents are poured into a new test tube each respectively after the tubes are incubated for 1 hour. One set of tubes is tested for:

Variables: In this experiment, the temperature (in degrees Celsius) of the chemicals is the independent variable. To change the temperature, the materials are placed in a bath of water being heated by a hotplate.