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More problematic for NASA, if life once existed on Mars but no longer does, the whole question of what life does is moot, since dead organisms don’t do anything. That’s why, for its latest mission, NASA is relying on different criteria. 2 TOUCHDOWN, GALE CRATER Curiosity set down in Gale Crater, and will navigate up Mount Sharp, where it will look for evidence of life. Mount Sharp is Curiosity’s ultimate destination. Possible route The slope of Mount Sharp is similar to that of the Grand Canyon.
Conducting an experiment d. drawing a conclusion e. asking a question about an observation 3 In a controlled experiment, which group receives the placebo? a. the experimental group b. the control group c. the scientist group d. the independent group e. all groups 4 In the studies of coffee and memory discussed, the independent variable is __________ and the dependent variable is _______________. a. caffeinated coffee; decaffeinated coffee b. memory; caffeinated coffee c. caffeine; memory d. memory; caffeine e.
What is the independent variable in this experiment? a. the amount of pain experienced at the start of the experiment b. the amount of pain experienced at the end of the experiment c. the degree to which pain symptoms changed between the start and the end of the experiment d. the drug e. The independent variable could be a, b, or c. 7 You are working on an experiment to test the effect of a specific drug on reducing the risk of breast cancer in postmenopausal women. Describe your control and experimental groups with respect to age, gender, and breast cancer status.
