1.3 Experiments DesignVersión en línea Practice the concepts of independent variable, dependent variable, control variable, experimental group and control group. por Jorge Arizpe 1 The moths are attracted by the light of the bulbs at night. Will the color of the light influence the number of moths attracted in one hour? An experiment has been devised where a green bulb, a yellow bulb and a standard bulb are placed. The bulbs are the same size and receive the same amount of electric current. The experiment is carried out for three days at the same time under the same weather conditions. Questions like "light color" and "number of moths attracted" are examples of: a Experiments b Variables c Groups d Data 2 The color of the bulb is a/an _____ variable a Independent b Dependent c Control d Static 3 The "number of moths attracted " is a/an _____variable a Not predictable b Control c Independent d Dependent 4 The size of the bulb remains constant in the experiment, which is why it's a/an _____ variable a Dependent b Independent c Control d Static 5 The variable that can be manipulated by the researcher is _______ a The moths diet b The bulb size c Number of moths attracted d Color of the bulb 6 The color of the bulb is a/an _____ variable a Qualitative b Quantitative c Colorimetric d Subjective 7 The number of moths attracted in one hour is a/an _____ variable. a Control b Relative c Qualitative d Quantitative 8 The sentence “What bulb color will attract more moths?" is an example of: a Result b Hypothesis c Experiment d Approach (research question) 9 A bulb of the original color was kept so we could compare the results of the experimental bulbs to it. We could say that this unaltered bulb is a/an____ a Experimental group b Control group c Lightless group d Group that doesnt participate in the experiment 10 The researcher thinks that “The yellow light will attract less moths”. This sentence is an example of a/an ______ a Approach b Result c Hypothesis d Observation 11 "During the nights you can notice that the moths are attracted by the light of spotlights". This sentence is an example of a/an_____ a Approach b Results c Hypothesis d Observation
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