|
This word is followed by "-ification" when plants transform into a combustible solid with increased carbon content |
coal
|
$400 |
J |
GEOLOGY |
2024-07-18 |
#9149 |
|
The Great Plains has many deposits calledclinker, baked red when seams of this mineral burned |
coal
|
$800 |
J |
GEOLOGY |
2021-12-21 |
#8537 |
|
Rudolf Diesel's first engine was designed to run on the dust of this solid fuel |
coal
|
$800 |
J |
FUEL FOSSILS |
2018-02-27 |
#7707 |
|
Utah's state rock, it's burned to produce heat & electricity |
coal
|
$200 |
J |
ROCKS & MINERALS |
2013-05-06 |
#6601 |
|
Pressure converts this fuel into graphite |
coal
|
$100 |
J |
ROCKS & MINERALS |
1996-09-09 |
#2761 |
|
Heating values of the bituminous type of this range from about 5,600 to 8,000 calories per gram |
coal
|
$200 |
DJ |
ROCKS & MINERALS |
1996-06-17 |
#2731 |
|
Worn during periods of mourning, jet is a hard, black variety of this mineral |
Coal
|
$800 |
DJ |
GEMS & JEWELRY |
1994-01-28 |
#2170 |
|
Heating it in an airtight oven turns this into coke |
coal
|
$600 |
DJ |
ROCKS & MINERALS |
1993-09-15 |
#2073 |
|
Peat is considered an early stage in the development of this fossil fuel |
coal
|
$200 |
J |
GEOLOGY |
1991-12-24 |
#1687 |
|
A major fuel in Eastern Europe, lignite is a soft brown type of this |
coal
|
$600 |
DJ |
ROCKS & MINERALS |
1990-12-05 |
#1443 |