Copy and Answer the 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?
video
Cell phones emit radiofrequency energy,
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.
Problem
Purple
Hypothesis
Hippos
Experiment
Eat
Results
Really
Conclusion
Cold
Repeat
Raviolis
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
DO NOW:
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 :
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
B. Dependent Variable
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.
B. Experimental Group
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?
1.
Similar results should be obtained when the
experiment is repeated
2. Only the expected results should be
considered each time the experiment is
performed.
3. The hypothesis must be correct.
4. The experimental period must be short.
1.
2.
3.
4.
a theory
the hypothesis
in inference
an observation
1.
2.
3.
4.
Light intensity affects the growth of algae.
Wind currents affect the growth of algae.
Nitrogen concentration affects the growth of
algae.
Precipitation affects the growth of algae.
1.
2.
3.
4.
A hypothesis requires no further investigation.
A hypothesis may lead to further investigation
even if it is disproved by the experiment.
A hypothesis requires no further investigation
if it is proved by the experiment.
A hypothesis can be used to explain a
conclusion even if it is disproved by the
experiment.

1.
2.
3.
4.
Which statement best explains why no mold is growin
in the white area next to the bacterial colony?
The mold cannot use the nutrient agar for food.
The bacteria may release a substance that prevents
mold growth.
The mold is causing the bacterial colony to reproduce
faster.
The bacteria are scavengers of the growing mold.