Chapter 1 The World of Life Science Section 2 Thinking Like A Life Scientist (Part 2 pages 15-18)

Why is it important to test many individuals in experiments?______________________________________________________________________ Does a scientist’s work end when the experiment is finished?______________________________________________________________________ What does it mean to say a scientist draws conclusions?______________________________________________________________________ What would a scientist do if they find that the experiment does not support the conclusion? ______________________________________________ ______________________________________________________________________ _________________________________ _________________________________

Why is it important to test many individuals in experiments? Testing many individuals ensures that the results from the experiment came from the experiment and not from other factors. Does a scientist’s work end when the experiment is finished? After scientists finish they must organize the data they collected. What does it mean to say a scientist draws conclusions? The scientist decides whether or not the results of the experiment support the hypothesis. What would a scientist do if they find that the experiment does not support the conclusion? Consider a new explanation / hypothesis to support their observations.

In the previous Power point we looked at a lab where frog eggs were exposed to UV light. This experiment supports the hypothesis that UV exposure causes frog deformities. Does this mean that the UV exposure is definitely the cause of the deformities? ______________________________ ___________________________________________ ___________________________________________ ___________________________________________ ___________________________________________ ___________________________________________ Are single experiments the end of an experimental mystery such as the one with the frogs from Minnesota?___________________________________________

In the previous Power point we looked at a lab where frog eggs were exposed to UV light. This experiment supports the hypothesis that UV exposure causes frog deformities. Does this mean that the UV exposure is definitely the cause of the deformities? This experiment tested only one cause on laboratory frogs. It did not take into consideration other possible factors on wild frogs including fertilizers and pesticides, contaminates, parasites etc. Are single experiments the end of an experimental mystery such as the one with the frogs from Minnesota? No, often it is the beginning of many experiments.

What do scientists do once investigations are complete? ______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ What is a theory? _________________________________________________________________________________________________________________________ Is it possible for scientific information to change? ________________________________________________________________________________________

What do scientists do once investigations are complete? Share / communicate the results. Often other scientists will repeat the experiments. What is a theory? A unifying explanation that has been supported by experiments. Is it possible for scientific information to change? Yes often new answers are found causing old answers to grow and / or change.

You will not find this in the reading – what are the parts that every good graph needs? ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________

You will not find this in the reading – what are the parts that every good graph needs? 1 – Main Title 2 - Title on the X axis 3 - Title on the Y axis 4 – Labels (in., yr., min., etc) 5 – Even Spacing 6 – Key (Possibly)