9781422287835

Words to Understand

potential: Possible. catastrophic: Causing sudden great damage. geologist: A scientist who studies the Earth. negligible: So small and unimportant that it’s not worth worrying about. plumb: Straight up and down. masonry: Stonework. distorted: Twisted out of its normal shape. concave: Curving inward to make a hollow. convex: Curving outward like part of a sphere or globe. conserve: Use carefully so as not to use it all up.