final Flashcards
what is a created controversy?
refers to a situation where people are deliberately generate a dispute, argument, or disagreement, often by manipulating information or exaggerating issues
how is creating controversy a helpful strategy for those who do not like some particular conclusion?
it leads people to doubt the conclusion leading
why do groups try to create doubt, rather than simply denying inconvenient scientific conclusions?
denying needs a burden of proof so creating doubt does not require proof, it is easier to keep a small lie than a large lie
what are some key strategies for creating controversy?
magnify uncertainty, cherry-picking data, ignoring disagreeable evidence
what is meant by the phrase “epistemically dependent”?
what is meant by the phrase “motivated reasoning”?
cognitive bias where people interpret and evaluate info in a way that aligns with pre-existing beliefs
how would the earth’s climate be different if all atmospheric gases were transparent to all infrared radiation?
all infrared radiation would escape the atmosphere and the earth would be much colder
why was john tyndall interested in the effects of atmospheric composition on global climates?
he wanted to find out what caused the ice age
the estimates of arrhenius and hogbom, concerning human effects on the climate, included two important assumptions, understandable but mistaken. what were these assumptions?
Arrhenius suggested that halving the atmospheric co2 would reduce average global temperatures by 8 degrees
Hogbom calculated the amount of co2 added to the atmosphere through human activity was less than 1000th that is already in the atmosphere
whose work in the 1950s challenged previous ideas about co2 absorption rate of the oceans?
dave keeling
what does the keeling curve measure?
the concentration of carbon dioxide (co2) in earths atmosphere
whose theroy related ice ages to variations in the earths orbit?
milutin milankovitch
which of the following are transparent to infrared radiation: oxygen, nitrogen, co2, methane
oxygen and nitrogen
approximately how many parts of the atmosphere (per million) were co2 in the late 1950s?
315ppm
approximately how many parts of the atmosphere (per million) are co2 today?
412ppm