How people changed the land and adapted to it

Grade 7 Social Studies Worksheet

Circle the best answer.

1. 1.

   In the Dutch chain, which box leads to two effects, Pia asks?

   • The dam closes the Zuiderzee
   • More land for farming in the polders
   • The Zuiderzee floods the land around it
   • No box in this chain leads to two effects
2. 2.

   What effects come from Lake Mead, Ren asks?

   • A new sea, and nothing else
   • Flood control, irrigation water and power
   • More floods each spring, and less water for farms
   • Polders of new land for farming
4. 3.

   When was the Zuiderzee closed, Zee asks?

   • 1931–1936
   • The early 2000s
   • 28 May 1932
   • 1960
5. 4.

   About how much new land did the Dutch works make, Ari asks?

   Use the picture in question 3.

   • About 1,650 km²
   • About 32 km²
   • About 68,000 km²
   • About 16.5 km², the size of a small town
7. 5.

   How many years did it take to build Hoover Dam, Bo asks?

   • About 5 years
   • About 50 years
   • About 3,867 years
   • About 2 years
8. 6.

   Why would people build a dam that controls floods, Jun asks?

   Use the picture in question 5.

   • To make the river flood more often each year
   • To protect towns and farms from floods
   • To dry up the river for good
   • To drain a sea into new polders
10. 7.

    Why were plans for one more Dutch polder dropped, Kira asks?

    • Views on the environment had changed
    • The sea had dried up by itself, with no dam
    • The first dam was not built
    • The polders made the floods worse
11. 8.

    Luz's note says, "The Afsluitdijk let the sea flood more land." Which fix is right?

    Use the picture in question 7.

    • Change "Afsluitdijk" to "Hoover Dam"
    • Change "sea" to "desert"
    • Leave it: the dam opened the way for the sea
    • Change it: it improved flood protection
12. 9.

    Milo's note says, "Hoover Dam had one use: making power." Which fix is right?

    • Change "Hoover" to "Banaue"
    • Change "power" to "polders"
    • Change it: it also controls floods and stores water
    • Leave it: one cause, one effect
13. 10.

    Noah's note says, "The Dutch works made new land for cities only." Which fix is right?

    • Change it: more land for farming, and flood protection
    • Change "land" to "lakes"
    • Leave it: the land was for cities
    • Change "Dutch" to "Spanish"