Huge or maybe large, not really sure It said they were speechless. It also said that it looks big enough to eat the dog. It never once implies that the fish is scary or monstorous.
Effect: Radiogenic heat released- Cause: convection currents cycle through magma. 2.) Effect: Earth has a powerful magnetic field- Cause: Iron in earths outer core swirls due to convection currents. 3.) Effect: tectonic plates move- Cause: unstable isotopes in earth release energy. : ) I think this is right