Larger than dust, this particulate matter from volcanoes ranges from .01 to .16 inches in diameter
From the Latin for "flowing together", it's where 2 or more streams flow together to form one
This electrically charged layer of the atmosphere makes long-distance radio communication possible
Rhodium got its name because its salts are this color
This element has the symbol N
Scientists figure the earliest atmosphere on Earth was from gases emitted by these
(Here is our science guy, Bill Nye) It's the gas produced by adding vinegar, an acid, to sodium bicarbonate
He improved the potato, & then came up with a totally new fruit, the plumcot
The cuttlefish hides 2 ways: it can camouflage itself like a chameleon, or hide behind a cloud of this
Having 4 large pairs of these makes the fruit fly a favorite subject for geneticists