Across
- 3. The mineralized remains of organisms and the rock layers in which they are found.
- 4. The very slow, creeping motion of Earth's mantle caused by convection currents.
- 7. The solid, innermost layer of Earth.
- 10. Theory that the crust is divided into large pieces called tectonic plates that slowly move on top of the mantle.
Down
- 1. Fossils that are widespread, have lived over a relatively short period of time and can be used to correlate rock strata.
- 2. The theory that continents were once connected but have drifted apart.
- 5. The solid layer of Earth between the crust and the core.
- 6. Huge pieces of crust that slowly move on the upper part of the mantle.
- 8. The thin, solid, outermost layer of Earth.
- 9. The liquid layer that surrounds the inner core.