The Oracle of Delphi used flames emanating from the rocks to create many prophesies in ancient Greece, not realizing that the flames were actually caused by this.
What is Natural Gas?
100
This hazard results in 15% of accidental deaths at work.
What are falls?
100
Generally believed to be poisonous, in 1820 this fruit went to trial in Salem, NJ. Robert Johnson ate an entire bag of these in front of a crowd at the courthouse, and when he didn't die, they were ruled safe for consumption.
What are tomatoes?
100
This order of operations is not just used in basic math, but also in excel functions and is also memorized by Please Excuse My Dear Aunt Sally.
What is parenthesis, exponents, multiplication, division, addition, subtraction.
100
Charles Lyell, in his book Principles of Geology, first proposed this in 1830, which is now called the bible of Geology.
What is The Geologic Column?
200
When burned, natural gas produces less than half of CO2 emissions as...what?
What is coal?
200
OSHA is the acronym for this government agency.
What is Occupational Safety and Health Administration.
200
The US Constitution was written on this type of paper.
What is hemp?
200
A straight line from the center of this to the edge is called a radius.
What is a circle?
200
There are this many volcanoes in the United States, fully active and able to erupt.
What is 18?
300
Natural gas is used to chill the glycol used to produce this, which is why hockey is such a popular sport now.
What is ice?
300
This controversial United States President signed into law the Occupational Health and Safety Act, which created OSHA.
Who is Richard Nixon?
300
The democratic party's symbol was adopted in 1828, when Andrew Jackson's opponents jokingly called him this.
What is a jackass?
300
The numbers of 1, 2 and 3 that we use today are based on this numerical system.
What is Hindu-Arabic.
300
Rubies and emeralds are actually made of this common mineral.
What is corundum?
400
Contained in makeup, plastic bottles and even clothes, this substance is often the result of fossilized biological matter.
What is crude oil?
400
OSHA is under this U.S. Department.
What is The Labor Department?
400
This largest city in America covers over 3,000 square miles, which is larger than the state of Delaware.
What is Juneau, Alaska?
400
This culture invented modern algebraic equations.
What is Egypt?
400
Combined, these lakes make up more than 20% of the world's fresh water, not counting underground aquafers.
What is the Great Lakes?
500
In ancient China, this material was used to create the first natural gas pipelines.
What is Bamboo?
500
This number indicates the regulations under General Industry.
What is 1910?
500
in 1919, this substance spilled in Boston, spreading 2 million galleons from a burst tank, pushing its way through the neighborhood and city and killing 21 people. Up until that time, it was the largest natural disaster resulting from a spill.
What is molasses?
500
Everyone knows you can get up to a million, billion and trillion. But this comes after trillion.
What is quadrillion?
500
The ocean floor is primarily made up of this igneous rock.