Grade 9 Science Crossword

Edit Answers
12345678910111213141516171819
Across
  1. 2. The sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
  2. 5. The speed of something in a given direction.
  3. 8. The rate of change of velocity per unit of time.
  4. 10. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  5. 12. Relating to the structure of the earth's crust and the large-scale processes which take place within it.
  6. 13. The quantity of motion of a moving body, measured as a product of its mass and velocity.
  7. 15. A substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  8. 16. The envelope of gases surrounding the earth or another planet.
  9. 17. Each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei.
  10. 18. Relating to or denoting chemical bonds formed by the sharing of electrons between atoms.
  11. 19. A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
Down
  1. 1. The process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll pigment.
  2. 3. A property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
  3. 4. The process of eroding or being eroded by wind, water, or other natural agents.
  4. 6. The resistance that one surface or object encounters when moving over another.
  5. 7. The regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
  6. 9. The tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
  7. 11. A biological community of interacting organisms and their physical environment.
  8. 14. An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.
  9. 17. Relating to, containing, or using ions.