Which of these choices is a disadvantage of the endangered species act? a. saves species from extinction b. increases environmental awareness c. costs a lot of money to enforce d. restores balance to ecosystems

Why might surface mining be less risky for miners than underground mining? a. surface miners can become trapped in a collapsed mine. b. surface miners work in dusty, enclosed areas. c. surface miners work aboveground. d. surface miners use elevators to enter mines.

In which situations is the principle of cross-cutting relationship useful in determining relative age?

Math focus 4. calculate a map has index contours at 250 m, 500 m, and 750 m. what is the contour interval?