Across
- 3. a simple substance that cannot be broken down into smaller parts or changed into another substance
- 5. total of all protons,electrons and neutrons
- 7. an electromagnetic wave with a wavelength in the range 0.001–0.3 m, shorter than that of a normal radio wave but longer than those of infrared radiation
- 9. the smallest structural and functional unit of an organism
- 10. strength or energy as an attribute of physical action or movement
- 11. a subatomic particle with a positive electrical charge
- 12. the study of living organisms
- 14. the movement of light conceptualized as a wave, defined by such properties as reflection, refraction, and dispersion.
- 15. the scientific study of matter and its motion and behavior through space and time
Down
- 1. a state of matter along with solids, liquids and gases.
- 2. exists in the nucleus of the atom alongside protons and makes up an atom's atomic mass with protons.
- 4. A small particle with a negative charge that is found in all atoms
- 6. the rate of change of velocity per unit of time
- 8. smallest unit of element
- 13. the force that attracts a body toward the center of the earth