By weather, fuel types and density's and topography. Obviously weather especially wind has a major role in fire intensity's. Fuel types and the moisture content of these fuels plays a big role. If you have a fire in timber for instance it usually runs alot slower than a fire in just grass. And last the topography of the land is huge also! Fire will travel uphill alot faster than downhill or flat ground. So ending this your answer would be fuels, weather and topography!!
A wildfire is formed by a little fire which builds up to a complete wildfire.
They gain energy by eating food.
No, objects that gain energy become hotter.
Volcanoes gain energy from the hot magma inside it
When condensation occurs, it is a gain thermal energy.
A temperature change requires as gain or loss of heat energy.
Most substances lose or gain energy when their temperature changes.
You gain Potential Energy as you cycle up a hill.
Lose
Sure, you can add energy to an object. For example, you can heat an object up (to have it gain heat energy), you can raise it (to have it gain gravitational potential energy), or you can make it move (to have it gain kinetic energy). In each case, the energy has to come from somewhere.
you can gain energy by absorbing sunlight or having an energy drink, having a good nights sleep, going to bed early.
potential energy