Question

practice it!
sisters yannie and yara share a room. they just got new bunk beds. yannie took the bottom bunk, and yara took the top bunk.
yannie complained that it was too cold on the bottom bunk for her. yara disagreed; she thought it was comfortable where she was
on the top bunk. yannie turned on the heat on the ac unit to warm the room.
select the statement that accurately predicts what will happen once the air conditioning is turned on.
convection currents in the room will push air throughout the room. warm air will rise, and cold air will sink. this will continue
until the temperatures switch. the top bunk will be cold, and the bottom bunk will be warm.
the overall temperatures will not change. the air conditioner will only heat the room where the vent is located. convection
currents only move through liquids.
conduction currents in the room will push air throughout the room. cold air will rise, and warm air will sink. this will contin
until all the air is the same temperature.
convection currents in the room will push air throughout the room. warm air will rise, and cold air will sink. this will contin
until all the air is the same temperature.

Explanation:

1. Analyze the first option: It says temperatures will switch (top cold, bottom warm), but convection aims for thermal equilibrium, not switching, so incorrect.
2. Analyze the second option: Air conditioners heat the whole room via convection, and convection occurs in gases (air) too, so "only heat where vent is" and "convection only in liquids" are wrong.
3. Analyze the third option: Conduction is heat transfer through direct contact, not "conduction currents" moving air. Also, cold air sinks, warm air rises (opposite of what's stated), so incorrect.
4. Analyze the fourth option: Convection currents in air (gas) move warm air up and cold air down, and this process continues until the air reaches a uniform temperature (thermal equilibrium), which matches the principles of convection.

Answer:

D. Convection currents in the room will push air throughout the room. Warm air will rise, and cold air will sink. This will continue until all the air is the same temperature. (Assuming the last option is labeled D; adjust label as per original question's numbering, but the text of this option is the correct one.)