The Earth is divided into three chemical layers: the Core [Inner Core (D) and Outer Core (C)], the Mantle (B) and the Crust (A). The Core is predominantly composed of iron and nickel. Even after 4.5 billion years of cooling, the Earth's core remains very hot.
Answer:
Calcium oxide （CaO）is ionic.
Answer:
An incendiary fire is when a fire is intentionally started knowing it shouldn't be. And an accidental fire is when a fire is started accidentally or without purposeful intent.
