Crossword Puzzle #1

12345678910111213141516171819
Across
  1. 2. A term used to describe the study of the structure and function of the nervous system and the brain
  2. 7. A term used to describe the study of the Earth's physical and biological systems
  3. 8. A four-letter word used to describe the force that pulls all objects towards each other
  4. 10. A five-letter word used to describe the branch of science that studies the relationship between living organisms and their environment
  5. 11. The study of the natural world, including the laws of physics and chemistry
  6. 14. A four-letter word used to describe the process by which a cell divides into two or more daughter cells
  7. 15. The process by which plants make their own food
  8. 16. The branch of science that deals with the composition, structure, and properties of matter
  9. 18. A term used to describe something that has mass and takes up space
  10. 19. The basic unit of life
Down
  1. 1. The study of the origin, evolution, and diversity of life
  2. 3. A branch of biology that deals with the relations of organisms to one another and to their physical surroundings
  3. 4. A subject that involves studying living organisms and their environment
  4. 5. A term used to describe the study of the behavior of matter and energy in the universe
  5. 6. The study of the chemical processes within and relating to living organisms
  6. 9. A word used to describe the smallest unit of an element that retains the chemical properties of that element
  7. 10. A four-letter word used to describe a type of energy that is produced by the movement of charged particles
  8. 12. The smallest unit of a compound that has the properties of that compound
  9. 13. A three-letter word used to describe a substance that cannot be broken down into simpler substances by chemical means
  10. 17. A term used to describe the study of the physical and natural world through observation and experimentation