question: What happens when you lighten a rocket?
choices.text: goes higher falls down
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: 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: goes higher
question_anno.less_effect_dir: falls down
question_anno.less_cause_prop: rocket
question_anno.more_effect_prop: rocket
question_anno.less_effect_prop: rocket
question_anno.less_cause_dir: rocket