Biology, 20.11.2020 22:30 katiegresham2838
Arthur reads an article describing an experiment to test the effects of caffeine on the reaction time of humans—how long it took them to respond to a particular signal. In the experiment, the subjects' reaction times were measured, then they were divided into three groups. One group was given a high dose of caffeine. The second group was given a medium dose of caffeine. The third group was given a sugar pill that had no caffeine. After waiting 45 min for the caffeine to take effect, the reaction times were measured again. In the experiment Arthur read about, what was the outcome variable (dependent variable)?
A.
the amount of caffeine given to each person
B.
the change in reaction times for each person
C.
the type of signal each person responded to
D.
the amount of time the caffeine was given to take effect
Answers: 3
Biology, 21.06.2019 19:00
The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.
Answers: 3
Biology, 21.06.2019 21:10
Using the periodic table, determine which material is most likely a good conductor
Answers: 3
Biology, 22.06.2019 00:10
Body systems are not completely independent they integrate and work together describe one example of the integration between body systems
Answers: 3
Arthur reads an article describing an experiment to test the effects of caffeine on the reaction tim...
Health, 01.02.2022 14:40
Mathematics, 01.02.2022 14:40
Social Studies, 01.02.2022 14:40
Mathematics, 01.02.2022 14:40
Mathematics, 01.02.2022 14:40
Mathematics, 01.02.2022 14:50
Mathematics, 01.02.2022 14:50
Mathematics, 01.02.2022 14:50
Mathematics, 01.02.2022 14:50
Spanish, 01.02.2022 14:50
Mathematics, 01.02.2022 14:50
Mathematics, 01.02.2022 14:50