question: If Mary is blowing an air horn underwater and she raises the temperature of the water, what will happen to the speed of the sound waves generated by the air horn?
choices.text: increase decrease
choices.label: A B
para: For a given medium such as air, sound has a slower speed at lower temperatures.
para_anno.effect_prop: speed
para_anno.cause_dir_str: lower
para_anno.effect_dir_str: slower
para_anno.cause_dir_sign: LESS
para_anno.effect_dir_sign: LESS
para_anno.cause_prop: temperatures
question_anno.more_effect_dir: increase
question_anno.less_effect_dir: decrease
question_anno.more_effect_prop: speed
question_anno.less_effect_prop: speed
question_anno.less_cause_dir: speed