Think 5 and 6

My answer : Heating the ring will allow the ball to pass through.They diameter of the inner ring will expand along with the thickness and the outer ring.The reason it expands and not contract is because when heated the molecules space out more but if the inner ring contract,instead it will bring the molecules closer.

My answer : When heated the molecules have more energy to escape the kinetic forces of attraction but when cooled down the thermal energy is transfer away and thus as it does not have that much energy,the kinetic forces of attraction will return the metal strip to its original shape.

Think 3 and 4

Think 3 : Though the temperature of both the tile and the parquet is the same,our sense of touch is a poor estimate of temperature,thus the tile feels colder.Both the parquet and tile has a lower temperature than our legs and so we lose thermal energy to them,but since we lose thermal energy to the tile at a faster rate than the parquet,it feels colder.

Think 4 :  The hotter water will lose thermal energy to the colder water, the colder water will gain heat from the colder water.After a while, they will reach the same temperature.(temperature equilibrium).

Think 1 and 2

My answer :

Q1 Since the outside is hotter and the room is colder,we enter the room hot and lose thermal energy to the cooler air in the room.

Q2 when we come out of a swimming pool,we are covered in water droplets.They evaporate fast due to the hotter surrounding as it is a hot day.They bring away thermal energy from out body,making us feel cold and we shiver to warm us up again.