[ 373 ] Life Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Refer to the following passage to answer the next six questions. A student is creating a science experiment for the science fair to research whether temperature affects the growth of tadpoles. He collects nine newly born tadpoles and separates them into three groups. He measures the size of each tadpole in each group, places them in equal amounts of water that is changed at the same time for each container, and feeds them equal quantities and types of food. In the first container, he maintains the temperature at 80 degrees. In the second container, he maintains the temperature at 68 degrees. The final container is left at room temperature, which varies around 75 degrees. Just as the tadpoles get to the twelfth week of their life cycle, the student measures the sizes of the tadpoles to determine whether the temperatures affected their overall growth. What is the hypothesis? What is the independent variable? What is the dependent variable?