Cwestiwn Mawr

Beth yw’r peryglon sy’n gysylltiedig ag echdoriadau llosgfynyddoedd ?

Cwestiynau

Cymharwch yr echdoriadau a welir yn Adnodd A.
Amlinellwch rhai o’r rhesymau fod rhai echdoriadau’n ffrwydrol ac eraill yn fyrlymus

Enwch a disgrifiwch y perygl folcanig sydd i’w gweld yn Adnodd B.
Awgrymwch pam fod y perygl yma’n peri risg uchel i bobl sy’n byw gerllaw llosgfynydd.

Mae’r graff cylch yn Adnodd C wedi ei seilio ar amcangyfrif o farwolaethau o ganlyniad i echdoriadau llosgfynyddoedd.

Pa achosion sy’n rhai Cynradd a pha rai’n Eilaidd ?
Pa berygl achosodd y gyfran fwyaf o farwolaethau ? Awgrymwch pam fod cymaint wedi marw o ganlyniad i’r perygl yma.

Adnodd A

Mt. St. Helens, Washington, UDA

Ffynhonnell: https://en.wikipedia.org/wiki/File:MSH80_st_helens_eruption_plume_07-22-80.jpg
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior.

Mt. St. Helens, Washington, UDA

Ffynhonnell: https://commons.wikimedia.org/wiki/File:Aa_channel_flow_from_Mauna_Loa.jpg
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior.
Adnodd B

Mayon, Philippines

Ffynhonnell: https://commons.wikimedia.org/wiki/File:Mayon_pyroclastic_flow.jpg
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code
Adnodd C