Scientific Vocab Words Complete these words on pages 5-9 in your journal. Scientific Method Bioengineering Independent Variable Adaptive technology Dependent Variable Assistive technology Control Group Prosthetic Constant Unintended consequence Bias Risk-benefit analysis Quantitative Qualitative Prototype

Scientific Method- a process that is used to gather evidence that leads to understanding a particular topic

Take these notes on page 10 And page 10 ONLY

Steps to the Scientific Method

Every Experiment must have… Hypothesis- an educated guess based on prior knowledge; can be tested by experimentation Independent Variable- the one variable being tested, changed, and manipulated by the scientist (There is only ONE Independent Variable per experiment.) *goes on x-axis when graphing Dependent Variable- the variable that changes in response to the independent variable (usually it is what you are measuring/collecting data on) *goes on y-axis when graphing

Hints to remember IV vs DV __________ depends on ____________ (DV) (IV) Ex: Question- How does fertilizer effect plant growth? Hypothesis- If the plant receives more fertilizer than it will grow more. _Growth_ depends on Amount of fertilizer

Let’s Test Your Brain Power! A (type/color of algae)

Do Now! 9/13 Individually, read the following scenario and answer the questions. Write in your “Do Now” section. Identify: Independent Variable Dependent Variable Control Group Experimental Group Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.

Control Group- must have one group/trial in the experiment that lacks the independent variable – used to compare to Experimental Group(s)- the groups/trials that contain the independent variable Controlled Variables- things that need to stay constant throughout the experiment all variables except independent variable

Let’s Test Your Brain Power! J (growth dependent on soil pH)

Let’s Test Your Brain Power! A (type of plants and placement, and time of day)

The Big Picture!

Practice Identify: Independent Variable Dependent Variable Control Group Experimental Group What should Bart’s conclusion be? How could Bart’s experiment be improved? Bart believes that mice exposed to radiowaves will become extra strong (maybe he's been reading too much Radioactive Man). He decides to perform this experiment by placing 10 mice near a radio for 5 hours. He compared these 10 mice to another 10 mice that had not been exposed. His test consisted of a heavy block of wood that blocked the mouse food. he found that 8 out of 10 of the radiowaved mice were able to push the block away. 7 out of 10 of the other mice were able to do the same.

Termite Trails

Termites are small, soft-bodied, usually pale-colored insects Termites are small, soft-bodied, usually pale-colored insects. They are social creatures and live in a caste system. Termites create colonies in the ground or in wood. Their food consists primarily of wood or other plant-based material. The workers are sterile and are responsible for the main work of the colony: collecting food; expanding the size of the colony; and feeding the queen, soldiers, and young.

Termites also exhibit some interesting behaviors Termites also exhibit some interesting behaviors. To illustrate, consider the following example. Take a blue felt pen and draw a figure eight. Then place several termites on the piece of paper in the middle of the figure eight and watch what happens….. Observation…

This observation raises an interesting research question: Why do termites follow the lines?