Across
- 3. Two or more atoms chemically bonded to form a stable unit
- 6. two or more kinds of matter intermingled; able to be separated by physical means
- 9. Occurs when an output of matter, energy, or information is fed back into the system as an input and leads to changes in that system.
- 10. subatomic particle with no charge
- 13. positively charged subatomic particle; the atomic number of an element
- 14. compound made up of carbon, hydrogen, and oxygen atoms; major source of energy for the human body
- 15. DNA and RNA; responsible for protein production
Down
- 1. a molecule containing a very large number of atoms; carbon, hydrogen, oxygen and sometimes phosphorous are present; proteins, lipids, nucleic acids and carbohydrates are examples
- 2. An organic compound that is made of one or more chains of amino acids and that is a principal component of all cells
- 3. anything that takes up space and has mass
- 4. Energy-rich organic compounds, such as fats, oils, and waxes, that are made of carbon, hydrogen, and oxygen.
- 5. A type of matter made of only kind of atom
- 7. negatively charged particle found outside the nucleus
- 8. A kind of matter composed of two or more different kinds of atoms bonded together in specific ratios
- 11. the central region of an atom; contains neutrons and protons
- 12. the smallest indivisible particle of matter