1) Broke into small pieces a) crumbled b) rippled c) flourished d) fragile 2) long periods of time without rain. a) crumbled b) droughts c) fragile d) ecosystem 3) all the living and non-living things in a particular area a) droughts b) ecosystem c) flourished d) imbalance 4) no longer in existence a) fragile b) imbalance c) droughts d) extinct 5) grew strongly; thrived a) flourished b) droughts c) fragile d) ecosystem 6) easily broken; delicate a) droughts b) ecosystem c) imbalance d) fragile 7) lack of balance a) imbalance b) droughts c) ecosystem d) ripple 8) formed small waves a) droughts b) extinct c) ecosystem d) rippled 9) In the story, what happened to the buffalo in the 1800s? a) They were killed by hunters b) their population grew c) they moved d) they were dangerous 10) What do buffalo eat? a) plants b) animals 11) Who was Theodore Roosevelt? a) A pilot b) A farmer c) A President 12) Why is it important to protect the grasses? a) They support many forms of life b) They are pretty to look at c) They kill grasshoppers and pests d) They start droughts

Fourth Grade Unit 2.3

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