If hydrogen bonds cause water to expand as it becomes ice, then what causes water to expand as it becomes ice? Answer choices: - evaporation - wind - Weathering - heat - gasoline - Generating heat - friction - hydrogen bonds
hydrogen bonds

If electricity sometimes is used for heating hospitals, then what is electricity sometimes used to heat? Answer choices: - space - hospitals - waves - direct energy - energy - Light - condensation - clouds
hospitals

If sonar is used to find other submarines, then what can sonar be used to find? Answer choices: - animals - coastlines - waves - rays or beams - submarines - water - tsunamis - patch reefs
submarines