If breathing is when a gill converts from oxygen in water into Hemoglobin, then breathing is when a gill converts from oxygen in water into? Answer choices: - tiny polyps - Hemoglobin - salmon - motility - unidirectional - exoskeleton - heat energy - epidermal
Hemoglobin

If abreathing mask is used to keep smaller particles out of the lungs, then abreathing mask can prevent what kind of particle from entering the lung? Answer choices: - light - harmful - rabies - A virus - x-ray - deadly - ion - small
small

If asequence of characters may start with runoff or water seeping out of a spring, then asequence of characters may start with runoff or what seeping out of a spring? Answer choices: - sodium - Joules - liquid - rivers - solutes - water - rain - SO2
water

If sulfur dioxide causes pollution, then what causes pollution in rain? Answer choices: - sulfur dioxide - carbon dioxide - nitrogen - contamination - smog - hydrogen - fossil fuels - flooding
sulfur dioxide