Tectonic plates

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Across
  1. 5. Movements driven by convection currents in the asthenosphere (mantle).
  2. 7. Two tectonic plates collide into each other and form ocean trench and a chain volcanoes on the seafloor.
Down
  1. 1. It is when pacific plate subducts under Mariana plate.
  2. 2. A very long, narrow and deep valley on the ocean floor, like an underwater canyon.
  3. 3. Two tectonic plate collide into each other.
  4. 4. Heavier tectonic plate went under the lighter tectonic plate and melt in the asthenosphere (mantle).
  5. 6. currents Occur in mantle (hotter rocks rise to lithosphere, cooler rocks sink to lower mantle).