What We Need - Substances Essential to Living Things

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Across
  1. 3. nutrients that are needed in larger amounts
  2. 5. Compounds that contain carbon.
  3. 6. Required for photosynthesis in plants and is an important component of bones teeth and DNA in humans
  4. 7. Compounds that do not contain carbon.
  5. 11. Catalysts that help control chemical reactions in living things.
  6. 13. Produced by both plants and animals and in humans used to store excess energy.
  7. 14. Plants obtain carbon and oxygen from this source.
  8. 15. Aids in the absorption of calcium and potassium in humans.
  9. 16. Production of fruits and grains.
Down
  1. 1. Plants obtain nitrogen, phosphorus, potassium, magnesium, calcium, and sulfur from this source.
  2. 2. Important for muscle contraction and nerve impulses in humans and helps plants resist diseases.
  3. 4. Organic molecules made up of carbon, hydrogen, and oxygen. They can be simple glucose molecules or more complex molecules such as starch.
  4. 8. Elements and compounds that organisms need for living, growing, and reproducing.
  5. 9. Important for cell division in plants and helps in blood clotting in humans.
  6. 10. Used for leaf and stem growth in plants and growth and repair of tissues in humans.
  7. 12. Made up of amino acids.