Answer:
The desert was one covered by ocean water.
Explanation:
I think 8 or 6 im not sure
All elements are pure substances.
freezing-energy lost (exothermic)
sublimation-energy gain (endothermic)
evaporation- energy gain(endothermic)
Melting- energy gain(endothermic)
deposition- energy lost(exothermic)
condensation-energy lost(exothermic)