If energy causes stuff to become hot, then what causes stuff to get cold?

freakin cold weather?

Think of it this way. if you want to melt an ice cube you can just leave it in the corner of your bedroom and it will melt but in you lived in the NorthPole you would have to make a fire in order to melt the ice because the room Temperature over there is below Zero degrees. So in order to change Temperature from a stable condition etc room Temperature energy is involved to get work done

nothing can get below 0 K which is absence of all motion in an atom 0 C is just the freezing point of water, and 0 F is 32 F below the freezing point of water, and a freezer uses electricity to run a compressor to manipulate the evaporation point of isobutane, which lowers temperature by using evaporation to carry away energy, because isobutane has a very low evaporation point.

In a refrigeration system, heat is moved from one location to another. Moving that energy requires work, so a refrigerator actually produces heat as it cools the area inside the refrigerator. That heat is moved to a location outside of the refrigerator. Heat actually moves "downhill". That is, heat moves from a warm location to a cooler location. Cold, being a lack of energy, can not move to a warm location. So how is that accomplished? It is really rather simple. As you know, water boils at 212 deg. F. If you increase the pressure on the water, the boiling temperature raises, as in a pressure cooker or in the boiler of a steam engine. Conversely, if the pressure is lowered the temperature at which the water boils is reduced. In a refrigerator, a chemical is used that has a boiling point in a range that is appropriate for the job being done. The boiling point is lowered by lowering the pressure on the refrigerant so it can "boil" at, say, -20 deg. F. In the process, the heat inside the freezing compartment moves into the low pressure refrigerant. It is the heat source that is causing the liquid refrigerant to boil. The resulting refrigerant vapor is then run through a compressor and the pressure is increased to a level that is well above the normal boiling point at room temperature. That high pressure causes the refrigerant vapor to condense back into a liquid. The heat is allowed to radiate away from the refrigerator, or is removed by a fan. The liquid refrigerant is then returned to the freezer, the pressure is reduced (by the compressor which serves as a "vacuum pump"). The flow is controlled by a valving method so there is always a flow appropriate to maintain a correct pressure differential between the freezer (low pressure) and the condenser (high pressure). It takes work (energy) so such systems always create more heat than cooling. The heat is always directed to an area where it is more desireable. (Such as outside of the refrigerator.)

You're right, it is a lack of energy which 'creates' cold. The reason something can be below zero is simply due to how we define the temperature scale. I can say that your body temperature is 'zero degrees human' (using a made up scale of 'human' temperatures). And therefore anything below body temperature would be below zero. (For example, zero degrees Celsius is just defined as the temperature at which water freezes) There's another scale that links the temperature more directly to the energy content however, called the 'absolute' scale (measured in kelvins). In this scale, things literally cannot go below zero degrees (in fact, they can't even get to zero at all due to entropy). The reason why your freezer requires energy is because to make things cold, you must pump out the heat. However, if the surrounding area (surrounding the freezer that is) is already warmer than the inside, then you're essentially pumping heat into an already heated environment. Imagine you had a bucket full of water (full to the brim), and inside the bucket, you had a smaller bottle full of water as well. Now imagine trying to empty the bottle (without removing it from the bucket), without losing any water from the bucket (i.e. without overflowing the bucket). It would take a significant amount of energy, since you would be trying to push out all of the water from the bottle and therefore compress the water inside the bucket. This is analogous to the freezer in a heated room. Except now your 'bucket' is the entire universe (or at least the surrounding area), the 'bottle' is now the freezer, and the 'water' is now thermal energy. And of course the reason you can't overflow the bucket is due to conservation of energy (you can't lose any water/thermal energy from the system). More technically, this all has to do with a concept called 'entropy', but it's not exactly intuitive.

Stuff gets cold when its heat energy flows to a colder object. Freezers uses electricity to generate a colder object which draws the heat away.

takes work to overcome ambient Temperature up or down.

loss of energy, but trully there is no such thing as cold.

Hi there, I think it would help to define what energy actually is, first. Then we can talk about hot and cold. By the way, I'm sorry this is a bit long, but you asked a question that calls for quite a bit of foundational knowledge before you can understand it completely. Energy is simply the ability to cause change. That change doesn't have to be a change in temperature, although it sometimes is. Energy can manifest itself in multiple ways. We sometimes say there are "different forms of energy", but that's not strictly true. All of the different "forms" are really just the same energy, manifested in different ways. Yes, it's nit-picky; in fact, you could be forgiven for saying that energy exists in different forms because it's just simpler that way. Now then, the different "forms" of energy can be remembered by the phrase I SCREAM: Internal Sound Chemical Radiant (Electromagnetic / Light) Electrical Atomic (Nuclear) Mechanical Internal energy comes in two varieties also: internal kinetic and internal potential. Internal kinetic energy has to do with how fast a substance's atoms and molecules are jiggling around. We measure that quantity as temperature. Here's the first important point: Temperature is a measure of the average kinetic energy of a substance's particles. If a substance is hot, then its particles have a high average kinetic energy. Put another way, a hot object's particles are jiggling around quickly. If that object cools down, its particles aren't moving so fast. Its atoms and molecules have a relatively LOW kinetic energy. How does an object heat up? There are different ways, but let's just focus on conduction. Conduction is when two objects with different temperatures are in direct contact with each other. The hot object gets cooler and the cold object gets warmer. Thermal energy that moves from hot to cold is called heat. Heat ONLY moves spontaneously (more on that word in a minute) from hot to cold. So, let's look at an example: say you have a bar of iron that's been heated to 100ºC, the boiling point of water. Now say you have a container of water whose temperature is 25ºC, about room temperature. If you put the hot iron in the cool water, what happens? The answer is obvious: the iron will get cooler and the water will get warmer. Why? Because the "hot" iron atoms, which were initially jiggling around like mad, transfer some of their kinetic energy to the much "cooler" water molecules, which in turn begin to move about faster. The heat transfer between iron and water will continue until they are the same temperature. I said that heat flows SPONTANEOUSLY from hot objects to cold objects. The word "spontaneouly" in this case means "without assistance". Heat CAN be made to flow from cold to hot, but you have to expend energy to do so. Consider your refrigerator. It seems to be an anomaly; it takes heat from inside the refrigerator and moves it to the WARMER surroundings. How can that be possible? Well, your refrigerator only works because you supply a constant source of energy - namely, electrical energy. Unplug the refrigerator and heat will begin flowing the way it wants to flow; that is, from the warmer surroundings to the cooler inside. So so answer your second question, freezers and refrigerators require a constant energy source because they are driving heat in the OPPOSITE direction from the one it would naturally flow. I hope that helps and apologize again for getting so long-winded. Good luck!