Questions: Which of the following conditions cause precipitation? temperature and atmospheric pressure

The answer is the first one: temperature and atmospheric pressure.

Explanation for each option:

1. Temperature and atmospheric pressure: This is the correct answer. Precipitation is primarily caused by the cooling of air masses, which leads to condensation of water vapor into droplets. Temperature changes can cause air to rise and cool, while atmospheric pressure affects the movement and lifting of air masses. When warm, moist air rises, it cools and the water vapor condenses into clouds and eventually falls as precipitation.

2. Percolation: This is incorrect. Percolation refers to the process of water moving through the soil and into the groundwater system. It is related to the movement of water after precipitation has occurred, not the cause of precipitation itself.

3. Surface runoff: This is incorrect. Surface runoff is the flow of water, typically from rain, over the surface of the ground. It occurs after precipitation and is part of the water cycle, but it does not cause precipitation.

In summary, precipitation is primarily caused by changes in temperature and atmospheric pressure, which lead to the condensation of water vapor in the atmosphere.