What causes the forest fire is not the presence of water, but rather the absence of it. Water puts out fires and prevents wet items from burning - you cannot hope to burn a wet towel unless the fire is there for long enough that the heat causes all the water in a particular area to evaporate. However when the object is dehydrated and then overheated, or if a spark lands on it, it will burn easily. A drought resulting in many dehydrated branches and leaves would increase the likelihood of a forest fire.
When I was a youngster and could not afford a magnifying glass, I would twist a piece of wire around a pencil so that it formed a round piece at the end of the wire. I would then dip the rounded end into water so that a blob of water made a very small magnifying glass.
I suspect that when it has rained this same effect is left on leaves, millions of tiny magnifying glasses all concentrating the suns rays onto what they happen to land on. Just one tiny focal point of a rain drop could possibly generate enough heat to start a fire.
Robert
Obviously it does.
The term 'rain forest' comes from the amount of rain that occurs there along the year, but it doesn't means that it rains so much there that the water could extinguish a big amount of fire.
Rusting will only occur in the presence of both water and oxygen. In the presence of oxygen, water vapour in the air will cause rusting to occur. So unless you are talking about the iron coming into contact with water vapour but when there is no oxygen, the answer is yes.
Cause of the presence of carbondioxide
The presence of excess bromine water will cause the pink color to disappear and it may be masked by the color of the reagent.
the presence of oxygen is the main condition that causes rust. however, many other substances can cause rust such as salt and water, lemon juice and coca-cola as well!
Oxidation (The bonding of oxygen to iron in the presence of water) Carbonation (Water + Carbon dioxide --> Carbonic acid) Acid Rain (SO2 or NOx + Water --> Acid Rain) All of the above will cause chemical weathering
forest cause the rain water is more acidic
Sunlight and wind can cause weathering.
The cause is the presence of the group -OH.
Sunlight and wind can cause weathering.
When clearing the forest by burning down trees cause water pollution because the smoke will form acid rain and go into the water where we drink... Read more on my page www.spheal.com and comment!
A water monitor is used to detect the presence of pollutants such as pesticides, metals and oil. It identifies whether water is meeting the designated use.
The main factor is the presence of water. If the sample is NOT fully dried of water it will cause a big 'spike' in the spectrum .
Rusting will only occur in the presence of both water and oxygen. In the presence of oxygen, water vapour in the air will cause rusting to occur. So unless you are talking about the iron coming into contact with water vapour but when there is no oxygen, the answer is yes.
Cause of the presence of carbondioxide
Mining operations in forest areas have also contributed to the destruction of forests.Mining activities cause soil erosion,while mine wastes and tailings pollute bodies of water.
Water can speed up the rate at which glaciers melt. Whether the water is acidic or not has no effect.
The presence of excess bromine water will cause the pink color to disappear and it may be masked by the color of the reagent.