Reference Table Review

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Across
  1. 4. The movement of a planet around a star, like Earth around the Sun.
  2. 5. The solid parts of the Earth, including rocks, minerals, and landforms.
  3. 6. The specific wavelengths of light emitted by an element or compound when energy is absorbed.
  4. 8. Classification of stars based on their temperature and color.
  5. 10. Energy transmitted as electromagnetic waves or particles.
  6. 13. The phase in a star’s life when it fuses hydrogen into helium in its core.
  7. 14. The mass of an object per unit volume. The reason for the Earth's layered interior.
  8. 15. All the water on Earth, including oceans, lakes, rivers, and underground water.
  9. 16. The spinning of a planet around its own axis.
  10. 18. The solid, outer part of the mantle that moves slowly and is part of the lithosphere.
  11. 19. A very large, bright star in the late stage of its life.
  12. 21. The process of forming new atomic nuclei from existing protons and neutrons in stars.
  13. 23. A massive explosion that occurs at the end of a massive star’s life.
  14. 26. Rocky planets like Mercury, Venus, Earth, and Mars.
  15. 27. A measure of how oval or circular an orbit is.
  16. 28. A region of space where gravity is so strong that not even light can escape.
  17. 30. Electromagnetic radiation with wavelengths longer than visible light, often felt as heat.
Down
  1. 1. The rigid outer layer of the Earth, including the crust and uppermost mantle.
  2. 2. The dense, solid innermost part of the Earth, made mostly of iron and nickel.
  3. 3. The total amount of energy or light a star emits per second.
  4. 7. The process in which two light atomic nuclei combine to form a heavier nucleus, releasing energy (powers stars).
  5. 9. The partially molten, slowly flowing layer of the mantle beneath the lithosphere.
  6. 11. The region of space between Mars and Jupiter where many rocky bodies orbit the Sun.
  7. 12. The transfer of heat in a fluid (liquid or gas) caused by the movement of the fluid itself.
  8. 17. A dwarf planet located in the asteroid belt between Mars and Jupiter.
  9. 20. The layer of gases surrounding a planet.
  10. 22. Gas giant planets like Jupiter, Saturn, Uranus, and Neptune.
  11. 24. A large cloud of gas and dust in space where stars are formed.
  12. 25. A small, dense star that has exhausted most of its nuclear fuel.
  13. 29. The angle at which a planet’s axis is tilted relative to its orbital plane.