Across
- 3. the relationship that exists between the size, number, or amount of two things and that is often represented by two numbers
- 7. a science that deals with the history of a planet as recorded in rocks.
- 11. any state or process known through the senses rather than by intuition or reasoning.
- 12. a group of animals or plants that are similar and can produce young animals or plants.
- 15. of or relating to an orbit, that is, he curved path that something (such as a moon or satellite) follows as it goes around something else.
- 16. the science or occupation of farming.
- 18. the line at which the sky and Earth appear to meet.
- 19. the act or process of moving or turning around a central point
- 20. a device that is used to obtain information from outer space and send back to earth.
- 22. existing in or derived from nature; not made or caused by humankind.
- 24. having to do with the natural force that causes things to fall towards the earth.
- 25. a set of things working together as parts of a mechanism or an interconnecting network; a complex whole.
Down
- 1. plural) any one of the very large groups of stars that make up the universe.
- 2. to look at (something) in a careful way to learn more about it
- 4. not in a state of sleep; completely conscious.
- 5. water falling in drops from vapor condensed in the atmosphere.
- 6. plural) a group of stars that forms a particular shape in the sky and has been given a name.
- 8. the entire range of wavelengths of electromagnetic radiation.
- 9. want something to happen or be the case
- 10. everything that exists anywhere.
- 13. the line at which the sky and Earth appear to meet.
- 14. a situation in which there is much destruction or confusion
- 17. a device that requires skill for proper use.
- 21. an obscuring of the light from one celestial body by the passage of another between it and the observer or between it and its source.
- 23. facts or information used usually to calculate, analyze, or plan something.