+

Scientific MethodMr. LambertIntegrated Science 1ATrimester 1, 2014

+Bell Ringer

1. Come up with a hypothesis for the following question:

Do wounds heal faster when they are covered by Band-Aids?

2. How could you test this?

+Agenda

1. Bellringer

2. Learning Targets

3. Scientific Method

4. Scenario activity

5. Design your own experiment

6. Exit Slip

+Learning Targets

On your Bell Ringer Sheet, write the following:

I can define important vocabulary about the Scientific Method.

+The Scientific Method1. Ask a Question2. Make a Hypothesis3. Design an Experiment4. Analyze Data5. Draw Conclusions

+ 1. ObservationLooking at something very closely

Example: Hmmm….fish in small bowls are small, but fish in big bowls are big.

Look for patterns!

+2. Ask a questionWhat are you curious about?

Example: Why are fish in fishbowls small, but fish in fish tanks big?

+ 3. Form a hypothesis

A prediction that can be tested using the scientific methodExample: Fish in large environments will grow to be

larger in size.

+ 3. Form a hypothesis

Key points:1. Can be TESTED2. Is state as FACT, not feeling or thought or

belief

+4. Design an experiment

A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.Example: I place one goldfish in a small bowl and one

goldfish in a big tank. After three months, I compare their sizes.

Good experiments have several components!

+ExperimentIndependent variable – what the experimenter changesExample: The liquid I feed the plants

Dependent variable – What changes as a result of changes made in the independent variableExample: Plant growth

Control - group that serves as the standard of comparisonExample: Feed plant water

+Analyze results and draw conclusions

I compared the size of my two fish after 3 months and the fish in the large tank was bigger! My hypothesis was correct!

Hypothesis wrong = NEW HYPOTHESISHypothesis right = SHARE RESULTS!

+Video!

Big bang theory scientific method http://www.youtube.com/watch?v=_7sSuhQ1_24

+Scenario activity

Individually determine the following:HypothesisIndependent variableDependent variableExperiment to test the hypothesisConclusion

+ Scenario #1In a science fair, Tina asks the question “Does caffeine increase the heart rate of an earthworm?” In Test 1, she measures the heart rate by looking at the earthworm under a microscopes, the earthworm has a heart rate of 50 bpm (beats per minute). In Test 2, she places a few drops of caffeine on the earthworm’s skin and measures the rate again. In this test, the heart rate is 68 bpm.

+ Scenario #2Bart 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.

+Design your own experiment!Question: Which is stronger, a Kleenex or no-name tissue brand?1. Come up with a hypothesis.2. Design an experiment using the following materials:

a. Cup/glass jarb. Rubber bandc. Pennies/washers/weightsd. Two types of tissues

3. What is the independent variable, dependent variable, and control?

4. What is your conclusion? What is your evidence for this conclusion?

+Exit Slip

Does the hormone estrogen increase the milk yield of dairy cows?Come up with a hypothesis for this questions.

Design an experiment to test your hypothesis.