| A | B |
|---|
| hypothesis | educated guess |
| observation | first step of scientific method |
| theory | based on experimental evidence |
| control group | unaffected group in an experiment |
| experimental group | a variable is changed in an experiment |
| placebo | substance containing no medicine & prescribed |
| percent error | measures the accuracy of experimental value |
| example of theory | evolution, climate change |
| example of hypothesis | plant will grow the same in artificial light as in natural light |
| example of control group | plant that is grown outside |
| example of experimental group | plant that receives artificial light |
