If gas bubbles burst when liquids are heated, then what happens when liquids are heated? Answer choices: - Evaporation - chemical reaction - air is cooled - food is chilled - It expands - gas bubbles burst - flow of electrons - bubbles reduce
gas bubbles burst

If the volume of water can determine the amount of water, then what can determine the amount of water? Answer choices: - rainfall - streams. - the volume - streams - evaporation - Temperature - erosion - vaporization
the volume

If the threat of being eaten causes a porcupine to extend its quills, then what threat would cause a porcupine to extend its quills? Answer choices: - snow - killing insects - being eaten - wind - rain - threatened - sea urchins - opossums
being eaten