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wrong category however i do have info of volcanoes as they form from underground yes even below water as well sometimes even forming land coming out of the water (hence the existence of hawaii and other forms of land) some may go dormant or stay active with each lava flow becomes charred ground afterwards (more info can be found on Wiki)
Volcanos erupt when the pressure from above the magma chamber holding it in, becomes less that the amount of pressure within the magma chamber forcing it out. Drastic pressure changes can occur due to shifts in tectonic plates and energy ripples flowing across the magma until it finds weak areas to breach.
OK, the whole Hawaiian Island chain is volcanic, formed from volcanoes which rose in turn from the ocean floor, erupted, formed an island around, then became less and less active in turn as the whole island chain moves away to the NW at 2 - 4 in per year.
Mauna Loa is one of 5 volcanoes which have formed the main island Hawaii. It is still active, and is a wide flattish volcano 4169 metres above sea level (13 679 ft).
It probably started erupting under the sea about 700 000 yrs ago, and rose above the surface about 400 000 yrs ago. It is a young volcano in geological terms as the oldest rocks found on its surface are 200 000 yrs old.
There is heaps more info here, but take care as some teachers do not like you to quote Wikipedia as a reference.
you need to ask your doctor to issue you a letter on his/her (hospital/ clinic) letter head
and if you want to write your own for proof then simply write
here is sample medical certificate written by patient or behalf of him/her
To whom it may concern
Mr/miss ________________ i was suffering from viral fever dengue and due to high grade fever and low platelates count i was at high risk of easy bruising so i was unable to attend school for two weeks
Here is my complete blood counts (CBC/ CP) reports.
sign and date
simply attach a CBC copy with this letter and submit to your school
P.s This is only sample please edit according to your need.
Regards,
Mustafa a Arain
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