Choose the answers to the questions

1) What are three main kinds of masonry dams? Complete the diagram.

a) buttress dams dams

b) earth-fill dams

c) arch dams masonry dams __________

d) gravity dams

e) rock-fill dams gravity _______ _______ _______ ________

f) roller dams

2) What are the characteristics of every masonry dam?

(Complete the table, matching the dam with the characteristics given after the table)

a) depend on their own weight h) is curved

b) depend for support on buttresses i) built in narrow canyons

c) built in wide valleys j) the most massive dam

d) built on solid rock foundation k) costly to build

e) a sloping upstream face

f) transfer the water’s force outward to the canyon walls

g) transfer the water’s force downward to the dam’s foundation