There are about 20,000 species of this organism that consists of an alga & a fungus living as a single unit
Because he wrote his books in Latin, Swedish botanist Carl von Linne was better known by this Latinized name
The symbol of this element stands for stannum, which originally denoted an alloy of lead & silver
In weather forecasting, the UV index refers to the intensity of this type of radiation
Whether alternating or direct, it's a flow of electricity
The Babylonians kept abreast of the times using a form of this instrument seen here:
Since limestone undergoes changes to become marble, marble is classified as this type of rock
"For every action there's an equal & opposite reaction" is Newton's third law of this
Musical instruments are tuned to 440 cycles per second, this note on a piano
On the centigrade scale, it's the melting point of ice