09 14 09 Notes
- 1. Biology and Human Concerns 09/14/09 – Notes Science as a Process Hypothetical-deductive thinking -Hypothesis -Deduction Scientific Method -The Flashlight Problem (page 10) Controlled Experiments -Control groups give you something to compare the experimental groups to. -The experimental group has only one thing (variable) different than the control group. Ex. Control group: normal temperature, no herbicide. (All eggs under this condition hatch.) Experimental group 1: high temperature, no herbicide. (11 hatched) Experimental group 2: normal temperature, herbicide. (0 hatched) Page 10-11 Investigating mimicry in snake populations -One species takes on similar characteristics to another species for protection. King snakes have the same colours in different order than Coral snakes. This protects the King snake, as it is not poisonous, but the Coral snake is, so other animals avoid it. -Scientists use plastesine, plastic or other model snakes to test theories of predator/prey relationships. Controlled experiment: Experimental group: -Artificial King Snake Control Group: -Brown snake