Because warm air is lighter then cold air.
So warm air will raise (to the top of the room) and cold air will stay down. When the warm air is cooling down it lowers and when cold air is heated/heating up it raise.
The room becomes cooler because warmer air goes out, and cooler air comes in.
Bottom, because cold water is denser.
I would think both. Cold air from the room goes in the bottom and warmer air comes out the top.
The oven is typically hotter on the top because heat rises, so the top of the oven tends to be warmer than the bottom.
An air conditioners usually installed at the top portion of the room because as cool air is heavier than warmer air so it settles down at the bottom due to which the cooler air goes up into the airconditioner and cools down.
a surface current is warmer becasuse it isn't near the bottom of the ocean its near the top so it gets more heat
this is her room (top) and her dressing room or closet (bottom)
It is colder at the top of a refrigerator because cold air sinks, causing the lower portion to be slightly warmer.
Yes, Atlantic deep water is warmer and less dense than the Antarctic bottom water, so it flows on top.
The top is warmed by the sun's rays. Warm water is less dense than cold water so if floats on top. As water cools it sinks to lower levels...until it reaches the bottom.
Heated from the bottom, the warmer substance will slowly rise to the top while the cooler substance at the top falls to the bottom to be heated again. Look at a lava lamp. That is all about convection currents.
Have one open at the top and one open at the bottom because the hot air will rise to the top and go out the top window while the cool air is coming in from the bottom and keeping the while house cool from to on its way to the top