The Study of Life

Investigate and understand nature Explain events in nature Use explanations to make useful predictions

Your definition:

Place a sheet of newspaper on the ground so that you and another person can stand on it, but no matter how hard you try, you and the other person cannot touch each other.

Develop a Question Data Driven Empirical

Make observations (without opening the box) Describe what the inside of the box looks like.

 Inference: logical interpretation based on prior knowledge and experience  Observation  Research

Choose 1 Architect 2 Interpreters 1 Builder

 Explaining Evidence  If …Then Statement  Based on Observation and Research  You should be able to justify why you chose a given hypothesis.

 Which generates more force, football or cheerleading? Which generates more force, football or cheerleading?  Which sport has the smelliest athletes? Which sport has the smelliest athletes?  Does moisture wicking clothing increase athletic performance in high heat? Does moisture wicking clothing increase athletic performance in high heat?  Which generates more force, Ray Lewis or a battering ram? Which generates more force, Ray Lewis or a battering ram?  Who is more accurate, an NFL quarterback or a professional archer? Who is more accurate, an NFL quarterback or a professional archer?

Setting Up a Controlled Experiment

Only 1 variable tested at a time What is the difference between a dependent and an independent variable?

 Look for patterns and draw a conclusions  Graphs are a great way to locate patterns and trends  Repeating and Publishing

What is the difference between the independent and depend variable?

The Control Group

Data Tables Drawings Photographs

Graphs are a great way to locate patterns and trends. Line graphs are typically the best in scientific investigations.

 Extending the graph, along the same slope, above or below measured data? What purpose would extrapolation serve?

 predicting data between two measured points on the graph. What purpose would interpolation serve?

 The lines on scientific graphs are usually drawn either straight or curved.  These "smoothed" lines do not have to touch all the data points, but they should at least get close to most of them What is the purpose of a best fit line?

Best Fit Line : The lines on scientific graphs are usually drawn either straight or curved. These "smoothed" lines do not have to touch all the data points, but they should at least get close to most of them.

What is the Control Group? The group without the juice What is the Independent Variable? Whether or not the workers receive juice What is the Dependent Variable Work productivity What should Bob’s conclusion be? The juice does not impact worker productivity. More trials needed for more conclusive data How could this experiment be improved? More trials Use a placebo

What was the initial observation? Slime on the shower Does it appear that Frank did good research before he began his experiment? Why or why not? No research indicates that coconut juice would be a good cleaner What is the Control Group? the half of the shower not sprayed with coconut juice What is the Independent Variable? treatment with coconut juice What is the Dependent Variable? Presence of scum What should Frank's conclusion be? Coconut juice is not effective as a scum remover

What is the Control Group? Those mice not exposed to UV radiation What is the Independent Variable? Whether or not they receive UV radiation What is the Dependent Variable? The strength of the mouse What should Billy's conclusion be? Inconclusive evidence…more trials needed