the scientific method music video: hwv7mq hwv7mq
TRANSCRIPT
The Scientific Method
• Music Video:
• https://www.youtube.com/watch?v=jPaGOHwv7mQ
The Scientific Method1. Identify the problem- observe and ask questions.
2. Research and form a hypothesis
3. Test your hypothesis- experimentation
4. Collect and record DATA
5. Conclusion- Analyze your data. Was your hypothesis correct?
1. Observe and ask Quesitons
• All scientists make observations that lead to different questions, without these questions we can’t experiment and without experimentation we wouldn’t have ANYTHING!
What is an observation?
• Lets make some observations about what Mr. Einstein is holding…
Observations vs. Inferences
• Observation- direct way of gathering information in an organized way.– Ex.
• Inference- taking observations and making a logical conclusion– Ex.
Lets do some practice!
• Make a list of observations in your notebook as you watch this scene from Emperor’s New Groove
• https://www.youtube.com/watch?v=JhWZIyJB-4U
•
Lets draw some inferences from our observations…
Observation Inference
Do NowUse the following picture and list 3 observations and 1 inference.
Do Now• Identify the following pieces of lab equipment.
1 2 3
4 5 6
Objectives
• SWBAT identify the steps of the scientific method.
• SWBAT create a hypothesis.
• SWBAT practice measuring and using scientific equipment.
2. Determine what is already known and form a hypothesis
• How might we determine what is known?– 1)– 2)– 3)
2. Forming a Hypothesis
• Hypothesis - a testable explanation of a situation.
• Hypothesis that are supported through experiments and data are then accepted in the scientific community.
• Usually written in an “if… then” statement.– Example:
• If salt is added to water that is being heated then the water will boil at a faster rate.
Identify the hypothesis
• A study is being done on the increase in cases of skin cancer. It has been said that skin cancer shows a direct correlation with exposure to UV light. If skin cancer is related to ultraviolet light, then people with a high exposure to UV light will have a higher frequency of skin cancer.
• Is this hypothesis a testable hypothesis?
Do NowTwo groups were testing how a new cosmetic
reacts on the skin and to see if they get a rash. One is was given the cosmetic with added aloe and the other had the original cosmetic.
1.Write a hypothesis for this experiment.
2.List 3 controls/constants that were kept the same between group A and group B.
Objectives
• 1. SWBAT define and identify the independent variable, dependent variable, experimental group, and control group in different experiments.
• 2. SWBAT compare and contrast qualitative and quantitative data.
• 3. SWBAT complete a worksheet on the scientific method.
3. Design a Controlled Experiment
i. Controls-
ex.
ii. Variable-
ex.
iii. Data-
Collect and gather data
• Quantitative Data- measurements of time, temperature, length, or other factors.
• Qualitative Data- descriptions of what our senses detect.
Gather both qualitative and quantitative data about the picture below.
3. Controlled Experiments (cont.)
Independent variable: variable that changes
Dependent variable: results from or depends on changes to the independent variable
Experimental Group: group that is being changed.
Control Group: group you keep the same (all variables constant)
Identify the components of the experiment
• A group of college students were given a short course in speed-reading. The instructor was curious if a reward would influence how fast students could take a reading test at the end of the course. Half the students were offered $5 for obtaining a certain time on the test, the other half were not offered money.
• Independent Variable:• Dependent Variable:• Experimental Group:• Control Group:
Do Now
• Identify : control group, experimental group, independent variable, dependent variable, constants
• Yankee Candle designers want to increase the time their candles burn for. They made a new candle with increased paraffin wax. They set up an experiment to compare the new candle vs. the old candle.
4 .Interpret Results
• A. Analyze data– Bar graph– Line graph– Pie chart
• B. Maybe need to refine and redo experiment
Analyze Data to from a Conclusion
• We have to do something with our data!
• What can we conclude from this graph?
5. Conclusion
• A.
– i.
Homework!!
• For homework you have a worksheet on experiments. This will be due the next class.