By definition it's a drug that relieves pain, induces sleep & is mostly derived from opium
Narcotic
This green pigment found in plants is similar in structure to hemoglobin
Chlorophyll
A very old vertebrate, the Greenland shark takes nearly 150 years to reach this; for humans, it's around age 10 or 11
Puberty
Shipworms have bacteria in their gills, not guts, that allow them to do this to wood
Digest
"m" represents this in Einstein's equation E=mc2
Mass
Myopia is another name for this
Nearsightedness
Each atom of this element has only one proton
Hydrogen
A compressed spring is an example of an object that has strong this type of energy
Potential
Term for the temperature at which water vapor in the air begins to condense & fall
Dew Point
There's an aid to navigation inside this force that raises an object in water, equal to the weight of the water it displaces
Buoyancy
RNA & DNA are the 2 main types of these complex molecules found in all living cells
Nucleic Acids
This ocean has the greatest average depth, about 14,000 fee
The Pacific Ocean
Proteins & cellulose are examples of these, materials made up of repeating chains of molecules
Count the crab's limbs, & you'll know why it & many other crustaceans are classified as these
Decapod
This climate event occurs in an unusually warm E. Pacific every 2 to 7 years & can change winds, currents & rain patterns
El Nino
It's the meteorological term for a rain cloud
Nimbus
The masseter muscle closes the jaw by lifting this bone
Mandible
According to Bohr's atomic model, electrons can jump orbit, emitting this light particle
Photons
A standard term in statistics, it's the difference between one of a set of values & the mean value of the same set
Deviation
(Seriously, y'all better get this one)
It's the outer, smaller & alphabetically first of the 2 moons of Mars
Deimos
Repeat kidney stones probably call for a visit to this type of kidney docto
Nephrologist
On a seesaw this is the product of the force used & the distance from the pivot point
Torque
This part of a plant contains the ovary
Pistil
In physics it's the study of objects whose motion or speed are affected by other forces
Dynamics
Also meaning a mark of disgrace, in botany, it's the part of a flower where pollination occurs
Stigma