Most Ancient Greek philosophers discusses the world around them but did not do any experiments or make detailed observations

Because to them it was just a little bit of fiction. so they don't really think it's necessary to do experiments or make detailed observation

Explanation:

it's just like how we presently today discuss about robot talking to us like humans but it's not yet come to pass .

coral.

explanation:

coral. many marine organisms that produce calcium carbonate shells or skeletons are negatively impacted by increasing co2 levels and decreasing ph in seawater.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.