1. Moisture: This is usually in the form of water vapor in the atmosphere. When the air is saturated or near saturation, condensation can occur, which leads to the formation of clouds.

2. Cooling of air: The air must be cooled in order for condensation to occur. This is because cool air cannot hold as much water vapor as warm air. Cooling of air often happens when warm air rises and expands in the atmosphere.

3. Condensation nuclei: These are small particles in the atmosphere around which water vapor can condense to form clouds. These particles can be dust, smoke, or even salt from the ocean. Without these nuclei, condensation would not occur easily.

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1. Moisture: This is usually in the form of water vapor in the atmosphere. When the air is saturated or near saturation, condensation can occur, which leads to the formation of clouds.

2. Cooling of air: The air must be cooled in order for condensation to occur. This is because cool air cannot hold as much water vapor as warm air. Cooling of air often happens when warm air rises and expands in the atmosphere.

3. Condensation nuclei: These are small particles in the atmosphere around which water vapor can condense to form clouds. These particles can be dust, smoke, or even salt from the ocean. Without these nuclei, condensation would not occur easily.

Knowee AI · Accepted Answer

1. Moisture: This is usually in the form of water vapor in the atmosphere. When the air is saturated or near saturation, condensation can occur, which leads to the formation of clouds.

2. Cooling of air: The air must be cooled in order for condensation to occur. This is because cool air cannot hold as much water vapor as warm air. Cooling of air often happens when warm air rises and expands in the atmosphere.

3. Condensation nuclei: These are small particles in the atmosphere around which water vapor can condense to form clouds. These particles can be dust, smoke, or even salt from the ocean. Without these nuclei, condensation would not occur easily.

List the three things necessary for clouds to form.

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