monday, august 31 st warm up: 1.please get out your isn from the cabinet and pick up an isn cover...
TRANSCRIPT
Monday, August 31st
Warm up:
1. Please get out your ISN from the cabinet and pick up an ISN cover from the “Take One” basket.
2. You will have about 10 minutes to decorate your cover while I pass out textbooks.
3. Once your ISN cover is decorated, please begin reading over p. 10 – 11 of your text.
Please be prepared to set up your ISN, we have a lot to cover and will move quickly.
The Scientific Method
Foldables
State Problem
The scientific method starts when you ask a question about something that you observe: How, What, When, Who, Which, Why, or Where?
Your question is based on your observations – the results of using one or more of your senses to gather information and taking note of what occurs.
It must be about something that you can measure, preferably with a number.
Gather Information
Your question is based on your observations – the results of using one or more of your senses to gather information and taking note of what occurs.
An inference is a logical explanation of an observation that is drawn from prior knowledge or experience.
Form Hypothesis
Like a scientist, develop a hypothesis – a possible explanation for an observation that can be tested by scientific investigations.
A hypothesis is an educated guess about how things work:"If _____[I do this] _____, then _____[this]_____ will happen.“
A prediction is a statement of what will happen next in a sequence of events.
You must state your hypothesis in a way that you can easily measure, and of course, your hypothesis should be constructed in a way to help you answer your original question.
Test Hypothesis
Your experiment tests whether your hypothesis is supported or not. It is important for your experiment to be a fair test. You conduct a fair test by making sure that you change only one factor at a time while keeping all other conditions the same.
Must be a controlled experiment with independent and dependent variables.
You should also repeat your experiments several times to make sure that the first results weren't just an accident.
Collect & Analyze Data
Once your experiment is complete, you collect your measurements and analyze them to see if they support your hypothesis or not.
Create tables and graphs.
Draw Conclusion
At the end of an investigation, you must draw a conclusion.
A conclusion is a summary of the information gained from testing a hypothesis.
Your conclusion can help you decide if your hypothesis was correct or if you need to test your experiment again.
Share
One of the most important steps in an investigation is to communicate your results accurately and honestly.
Exchanging information is one way of making scientific advances as quickly as possible and keeping scientific information accurate.
Tuesday,September 1, 2015Warm Up:
Flip to the third full page of your ISN… Write today’s date and the questions. Answer…
Scientist and nutritionists have long suspected that high-fructose corn syrup, used to sweeten soft drinks, is one of the causes of childhood obesity. In a recent study, at the University of Cincinnati, researchers found that mice that drank water with added fructose ate less solid food, gained more weight and put on 90% more body fat than mice that drank only water. Scientist concluded that fructose may affect metabolism in a way that favors fat storage.
A. The presence of fructose in their diet
B. The mice that drank only water
C. The weight gained by the mice
D. The quantity of water provided
E. The quantity of food eaten
1. What is the independent variable in this experiment?
2. What is the dependent variable in this experiment?
3. What is the control group used in this experiment?
Wednesday,September 2, 2015Warm Up:
Continue today’s warm up under yesterday’s in your ISN.
Sarah wanted to find out if temperature has an effect on the growth of bread mold. She grew the mold in nine Petri dishes containing the same amount and type of nutrients. Three were kept at 0 C, three were kept at 90 C, and three were kept at room temperature, 27 C. The containers were examined and the growth of the bread mold was recorded each Friday for five weeks.
1. What is the independent variable in this experiment?
2. What is the dependent variable in this experiment?
3. What is the control group used in this experiment?
4. Name two constants needed in this experiment.
Variables
Independent Variables
The variable “I” change on purpose.
Independent Variable is plotted on the X-axis.M – manipulated (changed)
I – independent
X – x-axis
Dependent Variables
The variable that responds to (depends upon) the change “I” make.
Dependent variable is plotted on the Y-axis.D – dependent
R – responding
Y – y-axis
Constant Variables
All factors that are kept the same and cannot change.
Control Group
No tests are performed on the control group so you can compare your experimental group’s results to a norm.