Across
- 4. Is a series of mountains or hills ranged in a line and connected by high ground.
- 6. Is molten rock that has been expelled from the interior of some planets and some of their moons.
- 7. Is a scientific theory describing the large-scale motion of seven large plates and the movements of a larger number of smaller plates of Earth's lithosphere, since tectonic processes began on Earth between 3.3 and 3.5 billion years ago.
- 8. Is the point on the Earth's surface directly above a hypocenter or focus, the point where an earthquake or an underground explosion originates.
- 11. Is a seafloor mountain system formed by plate tectonics.
- 15. Is a large landform that rises above the surrounding land in a limited area, usually in the form of a peak.
- 16. Is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
- 17. Are waves of energy that travel through the Earth's layers, and are a result of earthquakes, volcanic eruptions, magma movement, large landslides and large man-made explosions that give out low-frequency acoustic energy.
- 18. Is used to detect underwater mountains.
- 19. Is the outermost solid shell of a rocky planet, dwarf planet, or natural satellite.
Down
- 1. Is a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny.
- 2. Is a mountain range in Asia separating the plains of the Indian subcontinent from the Tibetan Plateau. The range has many of Earth's highest peaks, including the highest, Mount Everest.
- 3. Is a volcano that has had at least one eruption during the past 10,000 years.
- 5. Is a volcano that has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future.
- 8. Is the third planet from the Sun and the only astronomical object known to harbor life.
- 9. Is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth's lithosphere that creates seismic waves.
- 10. Is a major area in the basin of the Pacific Ocean where many earthquakes and volcanic eruptions occur.
- 11. Is hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
- 12. Is a geological process that takes place at convergent boundaries of tectonic plates where one plate moves under another and is forced to sink due to high gravitational potential energy into the mantle.
- 13. a linear feature that exists between two tectonic plates that are moving away from each other.
- 14. Is an active volcano that is not erupting, but supposed to erupt again.