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The process that causes dew to form on blades of grass is condensation. when water vapor in the air touches a cool object, like grass or a car window, it turns into a liquid state and settles on the object

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Final answer:

Dew forms on blades of grass due to condensation when water vapor in the air comes into contact with cool grass blades and turns into liquid droplets. This process occurs when the air temperature drops to or below the dew point.

Step-by-step explanation:

The process that causes dew to form on blades of grass is condensation. When water vapor in the air touches a cool object, like grass or a car window, it turns into a liquid state and settles on the object.

Condensation occurs when the air temperature drops to or below the dew point. At the dew point, the rate at which water molecules join together is greater than the rate at which they separate, causing the water vapor to condense into liquid droplets.

For example, when the air temperature cools down during the early morning or evening, the grass becomes cooler than the surrounding air. As a result, the water vapor in the air comes into contact with the cool grass blades and condenses, forming dew droplets.

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