Aim: How do scientists solve problems?. The Scientific Method. Do Now:. Copy and Answer the following questions into your notes. Be creative!!!!.
The Scientific Method
Copy and Answerthe following questions into your notes. Be creative!!!!
AI live in a country plagued with poverty and overpopulation. The houses in my village are constructed so close together that I get limited sunlight. In fact my elderly neighbor sleeps all day because she is confused as to when its day time or night time. Can u solve my problem?
a form of non-ionizing electromagnetic
radiation, which can be absorbed by
tissues closest to where the phone is held.
The amount of radiofrequency energy a
cell phone useris exposed to depends on the
technology of the phone,
the distance between the phone’s antenna
and the user, the extent and type of use,
and the user’s distance from cell phone towers.
Studies have not shown a
consistent link between cell phone
use and cancers of the brain, nerves,
or other tissues of the head or neck.
More research is needed because
cell phone technology and how
people use cell phones have
been changing rapidly.
Scientific method refers to a body of techniques for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.
Stated as a QUESTION.
The problem questions what you are looking to find out.
Example: What effect does the type of gas used have on the gas mileage of a car?
Stated as a prediction. Can be a “If…….then…….” statement.
Includes all aspects of your problem
Example: If high octane gas is used then a car will have the highest gas mileage.
The point in the experiment in which the hypothesis is tested.
A detailed procedural list must be followed.
Any data/observations that have occurred during the experiment which should be recorded.
Results are usually displayed visually in a table and/or a graph.
A detailed paragraph that states whether the hypothesis was supported or refuted.
Specific data must be referred to.
Possible sources of error that could have effected the experiment should be mentioned.
Multiple trials must be performed to prove validity of claim
When you are finished with your quiz….hand in answers and prepare for today’s notes
Brainstorm ideas for the following example……If a cork is put into a glass of water, the cork will almost always drift to the side of the glass. How can you get the cork to float in the center of the glass? Water, the glass, and the cork are all that is required.
It’s a wicked mega hit that delivers twice the buzz of a regular energy drink.
MONSTER packs a vicious punch but has a smooth flavor
All experiments must :
1. Be controlled.
In a controlled experiment only one variable is tested at a time.
Variable- is the factor in the experiment that could cause change or be changed
A. Independent Variable
The factor that is purposely altered by the researcher, that may or may not lead to change in the dependent variable. Generally it is the factor that you are testing.
Example 1: the amount of light
Example 2 : the amount of food you eat
The factor in the experiment that may respond to/ change due to the independent variable.
Example 1: the amount of plant growth
Example 2: your weight
A. Control group
The group in the experiment that has all conditions exactly the same as the experimental group, except the independent variable (the factor that is being tested)
USED FOR COMPARING
The control group is used for comparison of results, to determine if the change was caused by the independent variable or not.
The group in the experiment that has all conditions exactly the same as the control group in addition to the independent variable (the factor that is being tested)
When testing, there should always be a large number of subjects to provide accuracy and reduce any or all biases.
Biases – the preconceived notions that may alter results.
1. Which condition is necessary for an experiment to yield useful data?
A scientific study showed that the depth at which algae were found in a lake varied from day to day. On clear days, the algae were found as much as 6 meters below the surface of the water, but were found only 1 meter below the surface on cloudy days. Which hypothesis best explains these observations?
The diagram above represents a petri dish containing nutrient agar. A single bacterial colony is growing on the surface of the agar. A mold, represented by the shaded area, is also growing on the agar surface.