Across
- 1. a type of electromagnetic radiation that has a longer wavelength than infrared, and is commonly used to cook food
- 4. a group of clusters held together by gravity
- 5. a plume of magma rising up from the earth's mantle forms volcanoes on the earth's surface, and as the plate moves above it, the volcanoes move away, becoming dormant, and new volcanoes form. This was how Hawaii formed.
- 9. the theory that all of the continents were once one, and are drifting apart
- 10. when two plates collide, catch each other in passing, etc., and the result is multiple waves of kinetic energy that shake the earth's surface
- 12. a unit of distance used by astronomers, the average distance between the center of the earth and the center of the sun
- 13. a group of stars grouped by gravity
- 15. the center of the vibrations of an earthquake
Down
- 2. a type of electromagnetic radiation that has the longest wavelength, and is used to transfer information
- 3. the theory that the earth's crust is broken up into several plates which drift on the convection currents of the asthenosphere
- 6. the point on the earth's surface directly above the focus of an earthquake
- 7. a unit of distance, it takes light one year to cross this distance
- 8. a break in the earth's crust
- 11. a bunch of galaxies held in a cluster by gravity
- 14. everything, including solar systems, galaxies, galactic clusters, everything