scientific method by taif
TRANSCRIPT
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The
Scientific
Method
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The Scientific
MethodQuestion/Problem
Hypothesis
Materials
MethodObservations
Conclusion
Evaluation
VariablesBias
Theory
Law
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Inference/Hypothesis
Hypothesis a testable
explanation, kind of like educated
guess BRAIN POP
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Materials
What you need to run the
experiment, make a list make it
specific SCIENCEBUDDIES.ORG
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Method/Experiment
Experiment your problem BRAIN
POP Its important that your
experiment is a fair test. You make afair test by making sure that you
change only one thing at a time
while keeping all other conditions
the same SCIENCEBUDDIES.ORG
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Observations
A prediction that has evidence
BRAIN POP
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Conclusion
Conclude the problem and think if
your hypothesis was true or not if your
hypothesis is incorrect then it has to
be rethought BRAIN POP
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Evaluation
Something you want to do better in
the experiment the next time you do
it.
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Variables
The part of the experiment that
changes BRAIN POP A variable
is any factor, trait, or conditionthat changes
SCIENCEBUDDIES.ORG
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Bias
Something that will
make it unfair
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Theory
A theory is an
explanatory statement
that has been confirmed
that its true BRAIN POP
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Law
Repeated
experiment.
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Experiment 2: Animal
camouflage
Problem
How does camouflage affect vision?
Hypothesis
Materials
People would choose contrasting colour
over the matching colour.
Scissors,1 a4 brown
paper, 2 a4 green paper,
and group of people.
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Method
Conclusion
Evaluation
Cut 1brown paper and 1 green paper into 1 inch
squares. Mix the squares on the green paper. Tell
the group of people that you are testing how fasttheir reflex is. Give each person five seconds to
take the squares as much as they can in that
time. Record how many green squares and how
many brown squares they took. Do the other
people using the same method.
Our hypothesis was correct. People took morebrown squares. Here is a graph:
We should try this again
and make a theory
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Experiment 3: eggs
experiment
Problem
Hypothesis
Materials
How can I tell the difference
between a cooked egg and raw egg?
Cooked egg will spin very well raw will be slower.
2 raw eggs and 1 cooked egg.
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Observation
Conclusion
Evaluation
Method
When we shook the eggs 2 of them seemed like
they had liquid inside. When we put them inwater it didn't work and there was no difference.
Spin each egg on a hard surface see what
happens and record it.
When we spun the eggs one of them spun very
fast. We think that the egg that moved fast was
the cooked egg. Both the others spun very slowly
We should add more eggs
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Experiment 4:Surface
tension
Problem
Hypothesis
Materiels
If you bring different sizes of paper clip and let
it float will there be a difference between them?
The bigger paper clip will float better because
it will have more surface tension
Different size of paper clips, and a bowl of
water.
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Method
Conclusion
Observation
Evaluation
First bring several small paper clips and gently try
to make them float. Then get the big paper clipsand try to float them. Observe and record how
many paper clips floated from the small ones and
big ones.
The big paper clips did not float maybe
because it is heavier the small ones did.
My hypothesis was incorrect because the big
paper clips did not float. I think they didn't floatbecause they were heavier.
We should use a bigger bowl of water.
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Experiment 5:Water balloon
toss
Problem/question
Hypothesis
Materials
Method
Will a balloon break in longer distance or the
shorter?
The longer the distance between us the faster
the balloon to break
1.Several filled water balloons
2.A friend who doesn't mind getting wet
3. Old clothes
Pick up one balloon and stand facing your
friend. Toss the balloon. After a successful
catch, both of you take a step backward.After
your friend tosses the balloon back to you, each
of you takes another step backward. Continue
this process until the balloon breaks.See how far apart you can get without breaking
the balloon. Try this again but with bigger
balloons.
Excerpt From: Robinson, Tom. TheEverything Kids' Science ExperimentsBook. F+W Publications, Inc., 2001.iBooks.
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Observation
Conclusion
Theory
We started by 3 meters away for each other then
tried throwing the ball 4 times around but it didn't
pop but it only popped when it hit something hard
which doesn't count. When we were 8 meters
apart the balloon popped much faster and easier.
We noticed that The balloon seems to pop
whenever we were further apart. The balloon
seems to pop whenever it's in mid air. We noticed
that the texture of the balloons affected when it
popped. We realised that each balloon has adifferent texture. Each colour has a different way
of popping. The higher we throw, the easier it
breaks. On our last balloon it slid onto the ground
and because of friction the balloon popped.
When we were 8 meters apart the
balloon seemed to pop the fastest and
the easiest and our hypothesis was
proven right.
The balloon kept on
popping when we were
further apart for eachother and the higher we
threw it, it would pop in
mid-air.
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Experiment 6:Cow's
methane
Problem/questions
Hypothesis
Will adding garlic to cows feed reduce the
amount of methane produced?
Adding garlic won't work, because it causes
more stink,like bad breath.
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Materials
Method
Garlic
20 cows
Cows foodA machine that can test air
An empty room
1. Put cow in empty room for 2 weeks,Add garlic
to cows food.
2. Let the cow eat it.
3. Wait till finish, take a sample of air, see how
much methane in that
4. Try this again with the other 9 cows5. Try it again but by not adding garlic to the left
10 cows, test air 3 times a day.
6. See the difference, record and share
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Experiment 7:
washing detergent
Problem/
question
Materials
Which laundry detergent works best?
25 pieces of fabric (SAME COLOUR)Barbecue sauce
Grass dirt
Ketchup
Orange juice
5 different kinds of laundry detergent
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Method
1. Take one fabric put barbecue sauce on it
2. Do that to other 4 fabrics using, grass dirt,
ketchup, orange juice, and coffee3. Take the fabrics and hand wash them using
ONE laundry detergent for all 5 fabrics that have
the stuff on it
5. Rate the results from 1-4 (1 is BAD 4 is
EXCELLENT)
6. Do this again BUT with the other laundrydetergents
7. Tally the score about each result, See which
detergent is the best from clearing off the stains
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