Answer: Viruses.
Explanation: they have a jelly coat in their biological structure.
Answer:
Most liquids become monotonically denser when cooled from room temperature, but liquid water reaches its maximum density at approximately 4°C, below which it expands to become less dense as it is cooled further. To explain this density anomaly, several ideas have been proposed.
Explanation:
They change the air from water vapor (gas) to liquid water. This can produce clouds you see in the sky or dew or fogs.
