question: Ray was traveling in rocket leaving orbit. He keeps the empty fuel containers on board so the ship can fly
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: rocket so that it could fly higher
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: empty fuel containers
question_anno.more_effect_dir: can fly higher
question_anno.less_effect_dir: can fly lower
question_anno.more_effect_prop: ship
question_anno.less_effect_prop: ship
question_anno.less_cause_dir: ship