How did ancient greeks figure that the earth was spherical rather than flat? choose all that apply 1. viewing lunar eclipses 2. watching ships departing off the horizon 3. calculating gravitation changes at varying elevations 4. noticing changes in the stars at different locations 5. calculating angular changes of shadows

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

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Answerencourage alternative timber sources,increase public awareness of the forests,increase research into forestry,involve local communities in forest projectsalso one of the main initiatives of the 1977 act was to introduce a new approach to forest management known as selective management system, this is recognised as one of the most sustainable approaches to tropical forestry management in the world

Radiometric dating of igneous rocks