Across
- 3. Zone above and around our planet where there is no air to breathe or to scatter light
- 6. Mechanical force
- 8. Systematic study of the structure and behavior of the physical and natural world through observation
- 10. Electrons in the outermost shell of an atom
- 13. Force acting opposite to the relative motion of any object moving with respect to a surrounding fluid
Down
- 1. Structure in a cell that contains the chromosomes
- 2. Physical force exerted on an object
- 4. Process by which green plants and certain other organisms transform light energy into chemical energy
- 5. Aerodynamic force produced by the motion of a fluid past an object
- 7. Measure of a change in a physical quantity or magnitude used to quantify the duration of events
- 9. Elements that are good conductors of heat and electricity
- 11. Branch of science dealing with the physical constitution of the earth and its atmosphere
- 12. Gaseous chemical element that does not readily enter into chemical combination with other elements