They weigh the same. Both are defined in your question as a pound.
It's less dense
Cold air is more dense than warm air. If flows beneath the warm air and forces it to rise.When air warms up, it expands a little, and so it becomes less dense. Density is the ratio of mass to volume. Within a fixed volume, there will be less mass (less air) in a sample of warmer air than there will be in a sample of cooler air. The less dense air floats above the cooler air. This is why hot air balloons will rise.
a warm front moves faster then a cold front because it is less dense
Cold to warm
Cold salty water will be the most dense.
It's less dense
If you think to density (not weight) hot water is less dense.
Warm air is less dense (lighter) than cold air..that is why warm air rises and cold air settles
Cold air its more dense
True... warm water is less dense than cold water.
Cold air is more dense and less buoyant than warm air.
Warm water is less dense.
no cold air is heavier because it sinks and hot air rises
less dense
cold ocean waer has more dense than warm water.
Warm water is less dense than cold water, hence, it floats on top.