Endearing Terms
The idea that living organisms can be spontaneously formed from non-living substances.
What is spontaneous generation?
He worked on how traits are passed on during reproduction; also called genetics.
Who is Gregor Mendel?
Can science be used to prove that something is correct?
No. Science cannot prove anything!
An experiment in which neither the participants nor the people analyzing the results know who is a part of the control group.
What is a double blind experiment?
What is the mechanical advantage of a lever in which the effort it 10 inches from the fulcrum and the resistance is 2 inches from the fulcrum? (please show the equation you solve)
10 in. / 2 in. = 5
An example that contradicts a conclusion.
What is a Counter example?
This scientist was the first to make the assumption that energy comes in small packets called "quanta."
Who was Max Planck?
You should believe that the earth is round because Mrs. Nordell said that it was.
No. You should should always examine the data and follow what it says.
Name 3 experimental variables and tell whether you can learn something from it, or if they should be reduced/eliminated.
The additive used - learn something
The glasses used - reduced/eliminated
The cleanliness of the dishwasher before it is started - reduced/eliminated
Five pulleys are used in a block and tackle system. If you pull on the rope with 50 pounds of force, how many pounds can you lift with this system? If you want to lift the load 10 feet in the air, how many feet of rope will you need to pull?
5 x 50 lbs. = 250 lbs
5 x 10 feet = 50 feet of rope
The variable or part of the experiment to which all others will be compared.
What is the control?
He was a proponent of this system, which is the best description of how the planets and sun are arranged. (Scientist and name His view.)
Who was Copernicus and what is the Heliocentric system?
Our class makes some observations and form an idea about those observations. We then conduct some experiments and tests which all turn out to support the idea. Do we have a hypothesis, a theory, or a scientific law?
It is a theory. The hypothesis is before the experiments and it takes many years and more tests before it can become law.
Should this study be done as a single-blind experiment, double-blind experiment, or neither.
Double-blind experiment
The wheel of a wheel and axle has a diameter of 12 inches. The axle has a diameter of 1 inch. If you turn the wheel with a force of 10 pounds, (a) with what force will the axle turn? If you turn the axle with a speed of 1 foot per second, (b) how fast will the edge of the wheel turn?
a) 120 pounds
b) 12 feet per second
An educated guess that attempts to explain an observation or answer a question.
What is a hypothesis?
Name three accomplishments of Sir Isaac Newton.
1) Laws of Motion 2) Universal Law of Gravity 3) Invented Calculus 4) Wrote commentaries on the Bible 5) Redesigned telescopes 6) Showed white light is really composed of different colors.
Our class is in the middle of some experiments and we find that we have to change or throw out our hypothesis. What has happened to cause us to do this?
We found data that is not consistent with our hypothesis.
An athlete has develped a new workout that should produce greater endurance in any athlete. He decides to test his workout with a group of athletes. Half complete a traditional workout and half receive his new workout. They will monitor heart rates and breaths per minute with a special machine in order to test endurance levels. Should this be single-blind, double-blind, or neither?
Single-blind.
You push a box up an inclined plane so you don't have to lift it straight up in the air. If the inclined plane's slope has a length of 10 feet and a height of 2 feet, what is the mechanical advantage?
10 ft / 2 ft = 5
A device that either multiplies or redirects a force.
What is a simple machine?
The theory that Percival Lowell is best remembered for.
What is the theory that states there are canals on Mars.
Can I use science to determine whether or not fairies are real?
Yes! As long as you follow the scientific method, you can use science to study anything!
From the previous question, which group is the control: those who performed the new workout or those who performed a regular workout?
Those who performed their regular workout.
A screw's head has a diameter of 0.5 inches and a pitch of 0.1 inch. What is the mechanical advantage of the screw? (use 3.14 for pi and show your work)
Circumference = 3.14 x 0.5 = 1.57
MA = 1.57 / 0.1 = 15.7