Yes, The desert relies on precipitation from weather patterns while the rain forest can create its own precipitation.
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35 parts per thousand
Sea water. Seawater is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of approximately 3.5%, or 35 parts per thousand. This means that for every 1 litre (1000 mL) of seawater there are 35 grams of salts (mostly, but not entirely, sodium chloride) dissolved in it.
If a hypothesis is supported it becomes a theory if its not he or she has to make another hypothesis