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Forest Fires
Forest fires have caused devastation and regeneration all around the world for thousands of years. Forest fires may be devastating when out of control, but they are also necessary from time to time in order to keep forests healthy and regenerate new life. This category explores the effects forest fires have on our world.
574 Questions
Why does fire spread quickly in a forest?
Fire goes faster up hill for two reasons, first because the angle of the hill provides fuel to the fire at a faster rate, second because heat rises the fuel for the fire is pre-heated causing it to become more flammable.
How many bush fires are started?
There are about 30 - 50 or more fires a year, including bushfires . ---- This figure does not include the innumerable bushfires that occur in Australia every summer. Many years they are just spot fires that may burn hectares of land but cause little other damage. Some years, a large number of bushfires come together to cause immense devastation in Victoria, New South Wales or South Australia.
What happens when bush fires occur?
sorry i dont have alot of time but i have 2 answers:
1. the comunity helps clean up.
2. if something belonging to the comunity is burn or something else has happen ther in money for that.
Why are forest fire so dangerous?
Fire is extremaly hot and it can burn of your skin and you could also die. Don't go near fire!
Forest fires can cause destruction of habitats for plants and animals, loss of biodiversity, soil erosion, air pollution from smoke, and contribute to climate change by releasing carbon dioxide into the atmosphere. Additionally, they can result in property damage, human displacement and health issues from smoke inhalation.
How many wattage equal 1 volt?
Wattage and voltage are two different forms of measuring electrical power.
Voltage is measure of the strength of an electrical charge.
Wattage is the measure of the consumption of that charge.
Wattage is used to measure the heat generated from the flow of electricity between two points whereas voltage measures the density of electrical charge of that flow. The wattage produced is directly proportionate to the electrical resistance of the item when voltage is applied to or travels across it. This is why a 100 watt bulb is brighter than a 50 watt bulb. By using an element with a higher resistance to an electrical charge in a 100 watt bulb than a 50 watt bulb the 100 produces a higher "glow" because the electricity cannot travel as freely across the element causing it to heat up thereby consuming a larger amount of the charge passing through it. The amount the charge dissipates from one side to the other is the wattage. Or more eloquently stated as Ohm's law: The current through a conductor between two points is directly proportional to the potential difference across the two points.
What will happen to the plants after a forest fire?
Fireweed, whose seeds are carried on the wind similar to cottonwood tree or dandelion seeds, quickly colonizes areas disturbed by fire. I have personally seen areas that burned one year be completely filled with the purple blooms of fireweed the next.
How is a forest fire an analogy of cellular respiration?
Because cellular respiration is the process by which turning ADP into ATP, while burning a fire is just a release of energy.
Cellular Respiration= gaining of energy
Burning a fire=losing energy.
How often do fires happen in California?
Wildfires in Southern California happen as often as conditions permit, really. There are usually brushfires every year, but 90 percent of the time they only burn a few hundred or couple thousand acres per fire, and most do not threaten homes. It is the big fires, fueled by fierce winds that tend to threaten homes. Remember that most wildfires start with a heat source such as the sun or someone committing arson, and are then fueled by low humidity and high wind. For an in-depth article on how wildfires work, visit: http://science.howstuffworks.com/wildfire.htm
What will survive in a forest fire?
One animal that has a very flexible posterior and can withhold extreme climate's even heat like fire is some tropical squid.
What does forest fire give us?
in a way they do because they illiminate some trees and help control the forests because if there were no forest fires and deforestation then trees can take over and we would be gone but there will be some left for oxygen
forest fires usually occur inthe hottest season because of lightning sometimes occur and the sun's heat onthe dried grass and leaves
Why does wildfire happen often in forest?
it can be to hot and the sun can be focusing on one thing, if there is no breeze or water it can get really hot and catch on fire, a wildfire can also start if humans mess with lighters, cigarettes and many more.
What caused most of the fires?
Statistics for bushfires in Victoria, arguably Australia's most bushfire-prone state, indicate that the most common cause of bushfires in lightning strikes, accounting for 26% of fires in that state.
This is just ahead of 25% for deliberately lit fires.
See the related link below for more causes and the percentages for each.
Man made fibers are made from Man made products.
Products that are not found in nature naturally. Plastics, nylon, polyester, acrylic and polyolefin for example are all man made compounds
Nearly all of the manmade fibers are made from petroleum products.
Which of the following describes a process of succession after a forest fire?
It depends on where the fire occurs, and what kind of habitat is present. In general, most often, grasses and forbs will become reestablished first, followed within a couple years by the return of sapling trees and woody plants. Over many decades, fast-growing trees will become reestablished first, then eventually give way to old-growth forest types of trees.
Fire whirls are a rare but potentially catastrophic form of fire. These buoyant fire plumes are columns of ascending air with rotational motion which carry aloft smoke, debris, and flames greatly increasing the rate of fire spread .Fire whirls range from a foot or two in diameter to small tornadoes in size and intensity
Once a fire whirl leaves the influence of the main fire it quickly loses intensity and becomes an ordinary whirlwind
In order for a fire whirl to exist, there must be an organized source of angular momentum, either from wind shear or from the fire's convection column, which in turn creates large swirl velocities as air is entrained into the fire plume
Fire whirls occur most frequently where heavy concentrations of fuels are burning and a large amount of heat is being generated in a small area.
Mechanical forces are often present which serve as triggering mechanisms to start the whirl
.A common area for fire whirls is the lee side of a ridge where the heated air from the fire is sheltered from general winds. Mechanical eddies produced as the wind blows across the ridge can serve as the triggering mechanism to initiate the fire whirl. On flat terrain they tend to occur on the lee side of the fire near the outside edges of the front.
Even in small fires that aren't exhibiting extreme fire behavior, fire whirls can be created by lighting patterns. A rotational motion can be generated when two lines of fire come together, particularly if they approach at right angles. If large fire whirls are created, fire control problems can result.
Can forest fires be caused by man?
About 80% are caused by human activity, but sometimes not intentionally. For example, if a hydro pole falls and starts a fire, that is caused by human activity, because we built the hydro pole. If a campfire isn't put out properly, that is also considered human made, because we caused the fire by not putting out the campfire.
What happens at a fire investigation?
At a fire investigation there will be tried to find out where the fire has started and there will be investigated what caused the fire. Experts can tell by the traces how the fire spread and how it started.
On Apollo 13 what was the cause of the fire?
A short circuit occurred in the electrical system when the oxygen tanks were stirred. This caused oxidation and pressure loss to occur in one tank, and then the other which critically disabled the craft and aborted the mission.
The cause of the shorting was later thought to be from a combination of switch design and pre-launch detanking procedures where a switch welded shut, although this was unknown at the time. Normally this switch would open when the temperature rose and turn the heater off. Prior to this, there was a redesign of the voltage system and all components of the tanks were upgraded to the new voltage except the heater thermostat switches. This incompatibility allowed the temperature to rise during testing and to damage the Teflon-coated wiring.
Later, during the mission when the tank was stirred, the exposed wires shorted and the Teflon caught fire. In the pure oxygen environment, the fire was intense, and the resultant heat caused the tank to rupture and also damage the adjacent tank. One cover on the service module was blown off, which later caused Lovell to exclaim when he saw it as it was jettisoned " There's one whole side of that spacecraft missing!" Because the service module burnt up in the earth's atmosphere, as was normal procedure, the findings were made from an investigation into pre-launch procedures and reconstructions of the likely cause of events. The above conditions were simulated in a hangar, and another explosion occurred.
