space and life science

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Across
  1. 2. Dwarf planet crosses another rotation
  2. 3. A relationship between organisms where one organisms benefits and the other is neither harmed nor helped
  3. 4. Scale a device used to measure an object's weight
  4. 10. of Matter The form matter exists in. Matter exists in 3 states:
  5. 13. orbit the sun
  6. 15. Spinning on axis
  7. 17. Huge collection of gas, dust, and billions of stars and their solar
  8. 18. Planet the 4 inner planets are earth mercury
  9. 19. The relationships between organisms in an ecosystem.
  10. 21. The collection of all the populations of species in an area including plants and other organisms.
Down
  1. 1. Light is bouncing off of a surface
  2. 5. The process that plants use to turn water, air, and sunlight into food for growth
  3. 6. how much heat is in something, and you experience it every day
  4. 7. a reflection of you but all black
  5. 8. small, rocky objects
  6. 9. the total movement of an object without any regard to direction
  7. 11. the tilt on earth
  8. 12. Natural, giant, glowing balls of gas
  9. 14. If light passes through a medium and items on the far side appear blurry
  10. 16. venus
  11. 20. the green pigment that plants use to make food during a process called photosynthesis