Definitions
Double-Blind Experiment
Experiments in which neither the participant nor the people analyzing the results know who is in the control group.
Simple Machine
A device that reduces the amount of force needed to perform a task or changes the direction of a force.
Gregor Mendel's greatest contribution to science?
Determined how traits are passed on during reproductions
Mechanical Advantage Equation for a lever
Distance from fulcrum to effort divided by Distance from fulcrum to resistance
Egyptians were known for: science, applied science, or technology?
Applied Science
Control (of an experiment)
The variable or part of the experiment to which all others can be compared
Mechanical Advantage
The amount by which force or motion is magnified in a simple machine.
Copernicus' explanation of the planets and sun
Heliocentric System
What does the mechanical advantage do with a first class lever where the fulcrum is 10 inches from the resistance and 100 inches from the effort?
10x the force
You only need one of what to destroy a theory or Scientific Law
Counter Example
Hypothesis
An educated guess that attempts to explain an observation or answer a question
Theory
A hypothesis that has been tested with a significant amount of data
Laws of Motion, Universal Laws of Gravity, and invented Calculus
Sir Isaac Newton
If you want to lift a load 10 feet in the air using four pulley block and tackle system, how many feet of rope will you have to pull?
40 feet
Horizontal scale on a graph
x-axis
Counter Example
An example that contradicts a scientific conclusion.
What do we call people who want to turn lead into gold
Alchemists
Who falsely observed canals, vegetation and intelligent live on Mars?
Percival Lowell
The mechanical advantage of a screw and screwdriver is dependent on what?
The circumference of the screwdriver
When data being collected depends to some extent on the opinions of people
Subjective
Spontaneous Generation
The idea that living organisms can be spontaneously formed from non-living substances
Scientific Law
A theory that has been tested by and is consistent with generations of data
Max Planck's theory that ushered in a revolution in modern science
The idea that energy exist in tiny packets
Mechanical advantage equation for a screw?
Mechanical Advantage= Circumference divided by pitch
or
Diameter x pi divided by pitch
placebos