The dependent variable in Pedro's experiment of how changes in weather affect evaporation from lakes is Temperature and movement of air.
What is evaporation?
Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase.
What are the various factors that affect the rate of evaporation?
Various factors that affect the rate of evaporation are surface area, temperature, humidity and wind speed.
Is evaporation a physical change?
Yes, evaporation is a physical change as it involves only the change of state of water molecules and not its chemical composition.
How does humidity alter the rate of evaporation?
Humidity does affect the rate of evaporation. The larger the moisture, the more is air close to saturation. Hence, lesser would be the rate of evaporation.
Does temperature alter the evaporation rate?
Yes, the temperature does affect the rate of evaporation. On increasing the temperature, the rate of evaporation increases.
How does wind speed increase evaporation?
Evaporation increases with the increase in wind speed. Vapour particles move away when the speed of wind increases. This leads to an increase in the amount of water vapour in the atmosphere.
Thus, the dependent variable in this experiment is Temperature and wind speed.
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