Examlex
The CDC reports that ________ of both boys and girls aged 15-19 have engaged in oral sex at least once.
Scoria Cones
Small, steep-sided volcanic cones made of basaltic fragments and ash, typically formed around a single eruptive vent.
Weathered Rock
Rock that has been changed physically or chemically by the action of weather, water, or biological organisms.
Precipitation
Any form of water - liquid or solid - falling from the sky, including rain, snow, sleet, and hail.
Karst
A landscape formed from the dissolution of soluble rocks such as limestone, characterized by sinkholes, caves, and underground rivers.
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