Biology Crossword Puzzle

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Across
  1. 2. cell is able to reproduce so that a group of cells.
  2. 3. the first and longest stage of mitosis
  3. 6. Bond/ formed when one or more electrons are transferred from one atom to another.
  4. 8. the process of gathering information about events or processes in a careful, orderly way.
  5. 10. strong forces bind protons and neutrons together to form the ______
  6. 13. organisms that make their own food
  7. 14. small particles of RNA and protein found throughout the cytoplasm
  8. 15. amount of energy needed to raise the temperature of a gram of water degree celsius
  9. 17. proteins that act as biological catalysts.
  10. 18. the site where lipid components of the cell membrane are assembled, along with proteins and other materials that are exported from the cell
  11. 20. a substance that speeds up the rate of a chemical reaction
  12. 21. the science that employs the scientific method to study living things
  13. 22. cells that do not contain nuclei
  14. 24. plants use high energy of sunlight to convert water and carbon dioxide into high-energy carbohydrates
  15. 27. a slight attraction can develop between the oppositely charged regions of nearby molecules.
  16. 29. cells that contain nuclei
  17. 30. devices that produce magnified images of structures that are too small to see with the unaided eye
  18. 32. 2 tiny structures located in the cytoplasm near the nuclear envelope, separate and take up positions on opposite sides of the nucleus.
Down
  1. 1. variable that is observed and that changes in response to the manipulated variable is called _______
  2. 4. proposed scientific explanation for a set of observations
  3. 5. smallest unit of most compounds
  4. 7. an attraction between molecules of the same substance.
  5. 9. portion of the cell outside the nucleus
  6. 11. a pure substance that consists entirely of one type of atom
  7. 12. forms when electrons are shared between atoms
  8. 16. atoms of the same element that differ in the number of neutrons they contain.
  9. 19. variable that is deliberately changed
  10. 20. a substance formed by the chemical combination of two or more elements in definite proportions.
  11. 23. region outside of the thylakoid membranes
  12. 25. system a decimal system of measurements whose units are based on certain physical standards and are scaled on certain physical standards and are scaled on multiples of 10.
  13. 26. organisms that obtain energy from foods they consume
  14. 28. an organized way of using evidence to learn about the natural
  15. 31. positively and negatively charged atoms