Final answer:
Air, mercury, and water are fluids at room temperature and atmospheric pressure, while glass is an amorphous solid and is not considered a fluid.
Step-by-step explanation:
The substances that are fluids at room temperature and atmospheric pressure are air, mercury, and water. Air, being a gas, and mercury and water, both being liquids, have the ability to flow and conform to the shape of their containers. Hence they are considered fluids. On the other hand, glass at room temperature is an amorphous solid and does not flow; thus, it is not considered a fluid.
Air is a gas and water is a liquid at room temperature and atmospheric pressure. Mercury is also a fluid, but it is a liquid at room temperature and atmospheric pressure. Glass, on the other hand, is an amorphous solid and not a fluid.