Which of the following comparisons of the characteristics of the core and the mantle are CORRECT? Core Mantle Chemical compouition Rich in iron and nickel Rich in iron and aluminum Temperature Higher Lower AWN State of material Solid Plastic Density Higher Lower A 1. 2 and 3 only B 1. 2 and 4 only C 1. 3 and 4 only D 2. 3 and 4 only 0 6. Earthquakes most frequently occur A in the middle of oceans B in the centre of continents C on high mountains D along plate boundaries 7. The hazards indirectly caused by plate movement are earthquakes floods bwN- landslides Ionamis A I and 3 only B I and 4 only C 2 and 3 only D 2 and 4 only Which of the following descriptions of an oceanic crust are correct? It is about 5 to 10 km thick It forms the ocean floor. WN It is less dense than the continental crust. 4 It is rich in silica and aluminium. A I and 2 only B I and 4 only 2 and 3 only D 3 and 4 only