{
"rubric":"Help the train move forward by typing the right answer to score, then click on the balloon and drop it on the correct wagon.",
"attempts":"2",
  "Questions":[
    ["Q1 The force exerted by the muscles of our body is called  _________________ force","muscular"],
    ["Q2 The wheel rotates around the smaller circular object called _________________.","axle"],
    ["Q3 A _________________ looks like a nail with grooves cut into it.","screw"],
    ["Q4 The ability to do work is called _________________.","energy"],
    ["Q5 _________________ is a push or a pull that makes a body move or stop moving.","Force"]
 
  ]
}