Term for the time it takes a radioactive substance to decay to 50% of its original quantity
In biological classification this comes between family & species
On the Fahrenheit scale, the freezing point of water is 32° & the boiling point is this
In breathing it's the gas you expel to the atmosphere
Erosion from these created fjords & drumlins
Scientist John Dalton suffered from the red-green type of this
The surfaces of this type of element can be anodized
He discovered that if nitroglycerin was absorbed by an inert substance, it wouldn't explode from shock
The taste buds that sense sweetness are on the tip of this organ
Crowns put on front teeth are often made of porcelain; those put on back teeth, of this precious metal