Clean Room Video Flashcards
how was the “original” age of the earth established
- James Usher added up the years in the Bible based on an event that occurred on a KNOWN date (death of Nebuchadnezzar)
- used knowledge of generations to establish the earth was created on Oct 22nd 4004 BC
why could we not simply just add the layers of rocks
sedimentation rates VARIED substantially
where was the “stuff” left over from the creation of the solar system
astroid belt - the terrestrial matter NOT used in creation
explain how we can use uranium to lead to calculate the age of the Earth
atomic decay - it happens in very specific periods of time
why can’t we use rocks on earth to date the age
because no rock survived ( they undergo a rock cycle)
why was the [ ] of Pb AWLAYS off in all of Pat’s tests
there was too much background Pb present that would contaminate his sample and throw off the readings
what was seen about the lead in the environment
it was typical but NOT natural
what instrument did Pat use to measure the number of elements in a sample
mass spectrometer (uses lasers and magnets to separate sample into elements)
Why did Romans use lead plumbing
- it was cheap
- slaves
- easy to work with (had lower melting point)
why is Pb toxic to humans
it gets into cells and DOES NOT allow enzymes to do their jobs
- it mimics calcium and then enters the brain
what were the additive used in leaded gasoline and the issue
tetraethyl lead- it was fat soluble and it mimics the function of needed metals
who was Robert Keyhoe
scientific expert for the Pb industry (he wanted to cats doubt into the minds of the people about how lead was NOT bad)
how did Pat know that Pb levels in nature were typical but NOT natural
based on deep vs shallow ocean and glacier ice levels of lead (he knew the residents time and that amount of lead pre-dates the gas time)
