The heat that remains inside the Earth from its creation and radioactive decay are its main heat sources.
The deep earth receives heat from three main sources: (1) heat left over from the planet's formation and accretion, (2) frictional heating brought on by denser core material sinking to the planet's centre, and (3) heat from radioactive element decay.
The energy produced when unstable atoms decay is known as radioactivity, and it is a substantial contributor to the Earth's heat. The main source are the radioactive isotopes of uranium-235 (235U), uranium-238 (238U), potassium-40 (40K), and thorium-232 (232Th) in the Earth's mantle.
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Answer:
North American Tectonic plates
The Forestry Department is using a <u>chemical</u> control method. This involves using a <u>foliar spray </u>method, in which department personnel will spray pesticide directly on the trees’ leaves.
Explanation:
The chemical control method of pesticide control involves spraying chemical pesticides directly on leaves, shoots or roots of the plants. These chemicals are toxic to the pests only and the pests get retracted from the plants because of the pesticides applied.
A selective pesticide application is done to limit application to a target harmful pest which kills only that and does not harm the other useful or harmless species which thrives on the plants.
White pine blister causes rust of the branches and leaves of the pine trees. Hence, a foliar spray of the pesticide is done to control its spread.
Answer: Individuals can help in the earthquake disaster by 3 rules. The first rule is looking out for there neighbor if they see that they are stuck within the rubble of the earthquake . The second rule would to get yourself and your family out of the Quake zone. The third rule is always helping in a dire need like this one here if you are not able to help then please provide supplies to the teams that are willing to go searching for people. A community can not thrive on one man or woman they need all arms say if your home was destroyed in the quake I would hope your Community would be there to patch you up with there volunteers nobody can stand alone in this quake disaster if you do so then there is no Community .
We can solve this problem, if we use the rule of three.
x=the actual distance between these towns
1 cm----------------78 Km
3 cm---------------- x
1cm *x=3 cm * 78 Km
x=(3 cm * 78 Km) / 1cm=234 Km
Solution: 234 Km
