Simple machine Archimedes would use to "move the Earth" if you gave him a firm spot on which to stand
Magnetism occurs most strongly in 3 elements: nickel, cobalt & this
Emeralds & aquamarines are forms of this mineral
Highly flammable & once used for photographic film, it was the first commercial synthetic plastic
Chemists use this whirling device to separate solids from liquids or one liquid from another
Brimstone is another name for this light yellow nonmetallic element
The 16th letter of the Greek alphabet; in math it has the approximate value of 3.14
A lens that curves inward is concave & one that curves outward is this type
It's 1 or 2 or more atoms of the same element that differ in atomic weight
It's the branch of chemistry that studies compounds containing carbon