Estion 4 (May/June 2016 P1) Research shows that the average age of first menstruation is influenced by
socio-economic status as well as race.
Scientists carried out an investigation to determine the average age of the first
menstruation of the girls in a community
Their hypothesis was
The average age of first menstruation has decreased over time.
2.5.1 For the investigation state the
(a) Independent variable
(b) Dependent variable
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Select all the correct answers. which statements fail to meet the requirements of a scientific claim? a). in the final 100 meters of a 10,000-meter race, an athlete's speed is more strongly related to anaerobic efficiency than to aerobic efficiency. b). flowers that reflect the most ultraviolet light are more likely to attract bees and other pollinators than flowers that reflect less ultraviolet light. c). the evidence supporting newton's laws of motion was accurate in newton's time, but the universe operates differently today. d). even though evidence indicates that the solar system's planets follow elliptical paths, copernicus's model involving circular orbits is true.