The ability of dolphins, bats, and other animals (including humans!) to assess their surroundings by "reading" sound waves that bounce off objects around them.
What is echolocation?
100
This functions in much the same way as the human eye.
What is a camera?
100
A positively charged ion.
What is a cation?
100
An object at rest stays at rest, and an object in motion stays in motion unless acted upon by an outside force.
What is Newton's first law?
100
This is a better alternative to working out on concrete because of ground reaction forces.
What is running on soft ground?
200
Something that converts one form of energy to another.
What is a transducer?
200
A narrow band of frequencies of the electromagnetic spectrum that makes up what we can see.
What is the visible light spectrum?
200
Electrolytes in a solid form are usually used in these.
What are batteries?
200
Newton's third law.
What is the law that states that every action has an equal and opposite reaction?
200
Too little of this results in respiratory muscle weakness, cramps, and heart rhythm disturbances.
What is potassium?
300
The bones of the middle ear that amplify the vibrations of the sound wave.
What are the hammer, anvil, and stirrup?
300
The light sensing cells that line the retina.
What are rods and cones?
300
Electrolytes carry these across cells.
What are electrical impulses?
300
This is the strongest muscle by weight.
What is the masseter/jaw muscle?
300
Critical for the generation of electrical signals, but extreme amounts can be fatal.
What is sodium?
400
These line the inner ear (answer should include a number).
What is over 20,000 nerve cells?
400
A converging lens, or a lens that converges rays of light that are traveling parallel to its principal axis.
What is the shape of the cornea?
400
Mineral salts and bodily fluids.
What forms electrolytes, and what dissolves them?
400
Good posture places this above the pivot point in the hips, while bad posture causes it to misalign (and exert a torque about the hips).
What is the body's center of gravity (or CG)?
400
1,130 feet per second, or 770 miles per hour.
What is the speed that sound travels?
500
The ear canal is capable of amplifying sounds with approximately this frequency. (Answer should be in Hertz!)
What is 2000-4000 Hz?
500
About 120 million and about 6 million.
What is the number of rods and the number of cones in the retina, respectively?
500
The 6 most important electrolytes in the human body.
What are calcium, sodium, potassium, phosphate, chloride and magnesium?
500
The product of the linear force and the moment arm/ mechanical advantage of the muscle about the joint's center of rotation. (Mechanically, the distance from the muscle's line of action to the joint's center of rotation).
What is torque?
500
492-455 nanometers (nm).
What is the wavelength range for blue colored light?