How people changed the land and adapted to it

Grade 7 Social Studies Worksheet - Challenge Me

Circle the best answer.

2. 1.

   Why is the Aral Sea chain called a trade-off, Bo asks?

   • Gains came from it, and no losses
   • Losses came from it, with no gains for anyone
   • One change brought a gain and a loss
   • It traded goods with other lakes
3. 2.

   Which box leads to the desert box, Esme asks?

   Use the picture in question 1.

   • The first box, directly
   • Watered farmland in the Ferghana Valley
   • The dam finished in 2005
   • The lake down to 10% of its size
4. 3.

   How big was the Aral Sea before it shrank, Jun asks?

   Use the picture in question 1.

   • 68,000 km²
   • 6,800 km², a tenth as large
   • 680 km²
   • 1,650 km²
5. 4.

   By 2007, how much of its old size was left, Kira asks?

   Use the picture in question 1.

   • 90%, nearly the whole lake
   • 1%
   • 10%
   • 50%
6. 5.

   When did the rivers start to be diverted, Luz asks?

   Use the picture in question 1.

   • From 1932
   • From the 1960s
   • From 2005, when the dam was finished
   • From 2007
7. 6.

   What has happened in the North Aral Sea since 2005, Milo asks?

   Use the picture in question 1.

   • Its saltiness has dropped
   • Nothing has changed
   • The whole Aral Sea is full again
   • It has dried up completely
8. 7.

   Which sentence about the Aral Sea is careful, Noah asks?

   Use the picture in question 1.

   • Farms got the water, and the lake shrank
   • The farms are good and the lake loss did not matter
   • The lake shrank for no reason
   • Irrigation ruins each lake it touches
9. 8.

   Which other chain in this pack also shows people changing water to gain farmland, Pia asks?

   Use the picture in question 1.

   • No other chain
   • The Banaue Rice Terraces, cut from dry rock
   • The Dutch polders
   • The Aralkum Desert
10. 9.

    Ren's note says, "The Aral Sea shrank because it rained less." Which fix is right?

    Use the picture in question 1.

    • Change "Aral" to "North"
    • Leave it: less rain is the whole cause
    • Change "shrank" to "froze"
    • Change it: its rivers were diverted
11. 10.

    Zee's note says, "The 2005 dam refilled the whole Aral Sea." Which fix is right?

    Use the picture in question 1.

    • Change it: it helped the North Aral Sea
    • Change "dam" to "terrace"
    • Change "dam" to "desert"
    • Leave it: the whole sea is back