How people changed the land and adapted to it
Grade 7 Social Studies Worksheet - Challenge Me

Circle the best answer.
Diverting the rivers led to two effects. What are they, Ari asks?
- New polders, and a dam
- Watered farmland, and a shrinking lake
- A bigger lake, and farms left with no water
- One effect: more rain
Why is the Aral Sea chain called a trade-off, Bo asks?
Use the picture in question 1.
- Gains came from it, and no losses
- It traded goods with other lakes
- One change brought a gain and a loss
- Losses came from it, with no gains for anyone
Which box leads to the desert box, Esme asks?
Use the picture in question 1.
- The first box, directly
- The dam finished in 2005
- The lake down to 10% of its size
- Watered farmland in the Ferghana Valley
By 2007, how much of its old size was left, Kira asks?
Use the picture in question 1.
- 10%
- 1%
- 90%, nearly the whole lake
- 50%
When did the rivers start to be diverted, Luz asks?
Use the picture in question 1.
- From 2005, when the dam was finished
- From the 1960s
- From 2007
- From 1932
What has happened in the North Aral Sea since 2005, Milo asks?
Use the picture in question 1.
- Its saltiness has dropped
- The whole Aral Sea is full again
- It has dried up completely
- Nothing has changed
Which sentence about the Aral Sea is careful, Noah asks?
Use the picture in question 1.
- The farms are good and the lake loss did not matter
- Irrigation ruins each lake it touches
- The lake shrank for no reason
- Farms got the water, and the lake shrank
Which other chain in this pack also shows people changing water to gain farmland, Pia asks?
Use the picture in question 1.
- The Dutch polders
- The Banaue Rice Terraces, cut from dry rock
- The Aralkum Desert
- No other chain
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
Tala's note says, "Diverting the rivers had one effect: a smaller lake." Which fix is right?
Use the picture in question 1.
- Leave it: one cause, one effect
- Change it: farmland got water too
- Change "lake" to "sea wall"
- Change "rivers" to "roads"

