Most of the great deserts in the world are located near the equator. 30° north o

Question

Most of the great deserts in the world are located
      near the equator.
       30° north or southlatitude.
       60° north or southlatitude.
       deserts can be foundat any latitude.


Which cloud type is usually associated with the arrival of a strongcold front?
       high, thincirrus
       toweringcumulus
       lowstratus
       any ofthese


Evaporation and ice formation lead to a (an) ______ in seawatersalinity.
       increase
       decrease
       no change


Which of the following generally increases the density ofwater?
       lowersalinity
       lowertemperature
       lower sedimentlevels


The two most common ions in seawater are sodium and
       calcium.
       carbonate.
       magnesium.
       chlorine.


If life originated on Earth as heterotrophs, the firstorganisms
       must have carried onphotosynthesis.
       must have carried onaerobic respiration.
       must have beeneukaryotic.
       must have carried onanaerobic respiration.

Explanation / Answer

The first two relate to geography and the last to biology. Evaporation and ice formation lead to a (an) increase in seawatersalinity. This is because increase in ice formation and evaporationconcentrate the seawater Which of the following generally increases the density ofwater? lower temperature. Lower temperature reduces the volume.( For water until 4 degrees).So the density increases. The two most common ions in seawater are sodium and chlorine.

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