All of these processes are exothermic except: a
solid carbon dioxide sublimes into a gas
b
steam condenses to water
c
deposition
d
liquid mercury vaporizes
e
solid ice melts to water

Why is the melting of ice a physical change ?

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse

Which is true concerning the products and reactants of photosynthesis and cellular respiration? a. the products of photosynthesis are sugars and the reactants of cellular respiration are starches. b. the products of photosynthesis are reactants in cellular respiration. c. oxygen is needed for photosynthesis and is given off in cellular respiration.