The atmosphere is made up of 4 distinct layers: the troposphere, stratosphere, mesosphere, and thermosphere. Different types of clouds form in the different layers depending on the pressure in the atmosphere and the ambient temperature. The cloud types include nimbus, stratus, cumulus, and cirrus. Figure 1 shows the location of the barriers of the atmosphere when the temperature and pressure are at an ideal condition for cloud formation. It also shows the different types of clouds formed at the different levels. (Note: Clouds are formed mostly of water crystals, but can also contain particles of rock and dust.)If a pressure of 7 psi were sustained within the atmosphere, according to the image, which of the following types of clouds would likely form?

Correct answer: D. Stratus

  • A. Cirrus
  • B. Cumulus
  • C. Nimbus
  • D. Stratus

Explanation

At a pressure of 7 psi, the image shows that cloud formation will most likely occur in the stratosphere. According to that, clouds that form in the stratosphere are stratus clouds. This information best supports answer choice D.

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