Question

experiment: if a black, white, red, green, blue and yellow piece of paper is placed under a lamp, which color paper will absorb the most heat? materials: • 6 lamps • one piece of black, white, red, green, blue, and yellow paper • 6 thermometers • a stopwatch. procedures: 1. place the thermometer on the counter. 2. place the colored construction paper on top of the thermometer. 3. place the lamp so that it shines directly on the thermometer. 4. wait ten minutes, remove the construction paper and take the temperature reading. 5. record the data on a table. is this a valid experimental design? a yes, because paper is cheap to use. b no, because the paper might catch on fire. c no, too many different color papers are being tested. d yes, steps were outlined and there was one manipulated variable.

Explanation:

A valid experimental design has clear - outlined steps and controls variables. Here, the steps are outlined and the color of the paper is the manipulated variable. The cost of paper (A) is not relevant to validity. The risk of fire (B) is a safety concern not related to experimental design validity. Testing multiple colors is not an issue as long as variables are controlled.

Answer:

D. Yes, steps were outlined and there was one manipulated variable.