Given chemical formulas, identify ionic compounds and covalent compounds.

Why are people not able to scuba dive in the deep part of the ocean

How does climate change cause the ocean's thermohaline current to slow down?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?