question: David is getting ready to fly into space on a rocket. As the rocket shoots upwards, part of the mass falls away, allowing the rocket to go
choices.text: higher lower
choices.label: A B
para: By using multiple stages, empty fuel containers could drop away. This reduced the mass of the rocket so that it could fly higher.
para_anno.effect_prop: flying height
para_anno.cause_dir_str: reduced
para_anno.effect_dir_str: higher
para_anno.cause_dir_sign: LESS
para_anno.effect_dir_sign: MORE
para_anno.cause_prop: mass
question_anno.more_effect_dir: higher
question_anno.less_effect_dir: lower
question_anno.less_cause_prop: part of the mass
question_anno.more_effect_prop: rocket
question_anno.less_effect_prop: rocket
question_anno.less_cause_dir: rocket