950 A.D. Named after the Norse fire god Surtur, Surtsey (Surtur's island) is one of the world's newest islands. In November 1963, Surtsey was formed in a volcanic eruption which heaved it up out of the waters 18 km (11 mi) south-west of Heimaey; 32 km (20 mi) off the south coast of Iceland.
The radical in this question is OH.
The reason this will be a radical, is that the definition of a radical is the presence of an unpaired electron. This causes the radical to be unstable, desperately wanting to do something with the free electron that it has.
Oxygen has a charge of 2-, and Hydrogen has a charge of +1. When you pair them, you end up with a net charge of 1-, which is the presence of that unpaired electron. It will usually be written as:
the answer is decomposition.
Earthworms like staying under dirt because it shields their delicate bodies from exposure. Earthworms have no defensive shell or strong skin so they stay in dampness. The moist, cool earth keeps the worms hydrated.