GREAT physics experiment!
Wood is an insulator in part because it is less dense, so once your foot feels the cool, it is being insulated from losing more heat.
The Tile is dense and acts as a "HEAT SINK" it literally draws the heat out of the foot and stores it in the tile.
Too much wax can make the floor feel rather sticky.
In the short answer the terms are heat sink & Insulative value. Densely packed materials, like stone, glass & steel always feel cooler than paper, textiles or wood in the same conditions. Densely packed materials absorb and store heat, if they are at or cooler than your touch, they will seek to absorb that heat difference and store it, and since they are cooler & denser they just keep sucking the heat away & swapping it out for their abundantly and densely stored coolness. Wood on the other hand is much less dense. Wood floats, rock sinks. Wood is mostly air and cellulose, both of which are lighter than water so a log floats. Insulative value, almost all insulation works on a very simple premis, still air doesn't conduct much heat. So since wood is mostly wood it returns the heat, because its an insulator & tile, which is made of sand & ground stone, draws heat out of your hand because its a heat sink.
Ok, you say you sleep with the windows open. If you live in an area like in a coastal zone the dampness is coming in through the window. Close the window and see if that changes the factors. If it doesn't look at the other environmental factors. You don't mention if you have a swamp cooler or window cooler or air conditioner. Anything that involves water will create dampness .
With me it is a reaction to accidentally injesting MSG - monosodium glutamate. I feel like it is a 1000 degrees in the house and my husband says my skin is ice cold. It comes with other symptoms like my mouth, nose and eyes getting very dry. It lasts about 10 minutes and then settles down to where I just am shaking inside, and then finally that goes away.
The Unit being in Sun or Shade will have NO effect on how well a Swamp Cooler performs. Operation of Swamp / Evaporative Cooler effectiveness is determined by Ambient temperature / dew point and relative humidity. They are optimum in Dry / Hot / Low Humid climates such as found in the South West Desert areas of the U.S. The higher the Humidity / Dew Point, the LESS EFFECTIVE a Swamp / Evaporator Cooler will be. They cool by adding moisture to the Air. So the higher the Humidity is, the more the moisture content is in the air already, thus being less effective. Air can only support so much moisture before it starts to condensate. ( You will then start to feel Sticky and less comfortable ) Again, the Unit being in the Sun, verses being in the Shade, WILL NOT change the Coolers effectiveness in operation.
Heat sink, insulative value of air, density of substances & heat transfer.
Tile moves heat faster than wood. Wood is more of an insulator than tile. The feeling felt has do to with the speed at which heat is removed by tile.
It's not at all certain that it is any cooler. But wood is a better insulator than cement so it will drain less heat from your body where you touch it, that's why wood will feel warmer.
glass is always at a lower temperature than wood
Metal can conduct heat away from your body (hands) faster than carpet.
The wind can make it feel cooler - wind chill.
The wind can make it feel cooler - wind chill.
Floor tiles absorb heat rapidly. This means that if you stand in bare feet on tiles, a lot of heat is drawn out of your foot. A carpet in comparison, absorbs heat slowly. This makes floor tiles feel colder that a carpet when they are actually the same temperature.
Lay on a wooden or linoleum floor. (do NOT use your bed) Usually you will feel a sudden pop. If that doesn't work do jumping jacks.
To tell you the truth, if you think about, the clothes you wear are sticking to your skin making you feel hot. When you take your clothes off, it already makes you feel way cooler. Also, since the pool is usually cool/cold, that just makes you feel cooler on a hot summer's day.
Some substances conduct heat better than others. Things like stone, granite and steel tend to feel cold because they conduct heat away from a bare foot faster and better than, for example, wood or plastic. This is because their particles are more densely packed and hence conduct heat faster. Hence the stone floor feels cold to bare foot( which gives off body heat) as the body heat from the foot will be conducted away quickly. Another reason is due to that feature(conducting heat away quickly for example, from the sun) of the stone floor and the fact that our body produce body heat, it will usually be colder than you body.
If the earthquake is weak you won't always feel it. Our first floor neighbours almost never feel earthqukes that we on the 11th. floor do.