Across
- 4. floor spreading-the usual process at work at divergent plate boundaries, leading to new ocean floor.
- 5. molten, hot liquid in the earth's mantle, that comes out as lava during eruptions.
- 7. the washing away of soil due to heavy rains
Down
- 1. is a rupture in the crust of the earth that allows hot lava, ash and gases to escape from magma.
- 2. molten rock the comes out of volanic eruptions
- 3. rocks
- 6. drift-large scale horizontal movements of continents relative to one another and to ocena basins during one or more episodes of geological time.