Across
- 5. The amount of dissolved salts in water.
- 8. A _________ structure is made of parts (structural components) fastened together.
- 9. Structural ___________ are permanent changes to a structure due to the internal and external forces acting on it.
- 14. This type of element is non-living (water, rocks, etc.)
- 15. A __________ structure is a structure that is strong, hollow and light for its size.
- 17. Complex system where living things interact with other living and non-living things.
- 18. The ability of a structure to maintain or resume its position when an external force has been applied to it.
- 21. The variety of life in the world or in a particular habitat or ecosystem.
- 22. A consumer that feeds off waste.
- 24. A type of internal force that twists a structure.
- 26. The science of designing equipment that people can use more efficiently and safely.
- 27. An area of land where all the water eventually drains into one main body, such as a stream, river, wetland, lake or ocean.
- 29. Describes the close interactions between 2 or more different species where both species benefit from the the relationship.
- 30. Area of soft soil intermingled with water (a marsh)
- 31. A curved structure that can support a lot of weight due to the force of weight being carried along the sides to its supports. This spreads out the effect of any load.
- 32. An interaction between organisms or species in which both compete for survival.
- 33. This consumer eats a primary consumer.
- 34. A long, hollowed shaft drilled down into an aquifer to obtain fresh water.
Down
- 1. An underground freshwater reservoir.
- 2. A place that provides living things with oxygen, water, food, shelter and anything else they need for survival.
- 3. Populations of different species that live and interact in a habitat.
- 4. An externa force that acts on all structures (natural force of attraction between 2 objects).
- 6. This geometrical shape provides the greatest structural strength.
- 7. An animal that eats meat.
- 10. A __________ factor controls the number and health of biotic elements in ecosystems (food availability, predators, suitable habitat).
- 11. A consumer that breaks down dead plants, animals and waste products into smaller pieces.
- 12. Contact that is harmful to humans, other animals and the environment
- 13. Plant or plant-like biotic element that can make its own food to supply the matter and energy it needs to survive.
- 16. A balanced arrangement on opposite sides of a structure (equal halves).
- 18. Ability of something to exist or be used at the same level for a long period of time without being damaged, harmed or reduced for future use.
- 19. A rigid framework of beams jointed together. They are usually in the form of interlocking triangles.
- 20. _________ of application is the exact location where a force meets a structure.
- 21. This type of element is a living thing in an ecosystem (plants, animals)
- 23. Type of internal force that stretches a structure apart to expand or lengthen it.
- 25. An animal that eats plants.
- 28. This type of load is a force that moves or changes while acting on a structure.