Rain gauges collect and measure the amount of rain that falls on a particular spot. If you collected all the rain gauges in the world and placed them side-by-side, they would cover an area the size of: *

When a rock is mechanically weathered, the surface area of the rock is increased, which allows a greater amount of chemical weathering to occur. the surface area of the rock is increased, which hinders chemical weathering. the volume of the rock is decreased, which hinders chemical weathering. the volume of the rock is increased, which allows a greater amount of chemical weathering to occur. the surface area of the rock is decreased, which allows a greater amount of chemical weathering to occur