1. Erosion can occur when:
a) The top soil is removed b) Machines create ruts c) Water flow builds up on the road d) The soil is compacted e) All of the above
2. Siltation results from:
3. Siltation can destroy:
4. List three ways to reduce erosion:
5. Wildlife refers to:
a) Mammals b) All wild organisms and their habitat c) Campers 6. Roads construction can: a) Dry up wetlands b) Flood wetlands c) Both 7. List three reasons to avoid building roads in wet areas:
8. When crossing a stream, locate road:
a) to approach bridge in a straight line b) On a low slope c) At a stable location d) All of the above
9. If possible lay out road:
a) On high ground b) On gentle slopes c) Following the contour d) All of the above
a) Sand b) Silt c) Gravel d) Clay