Matter and Ecosystems

2. An organism that makes its own food like a plant
3. the number of protons in the nucleus of an atom
7. an element that is shiny and that conducts heat and electricity well
10. Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.
12. A relationship between two species in which both species benefit
13. change in a substance that does not involve a change in the identity of the substance
14. A subatomic particle that has no charge and that is found in the nucleus of an atom
16. a vertical column of elements in the periodic table with similar properties
19. element that is dull, brittle, and poor conductor
20. Provides the Cells with Quick Energy
22. Electrons on the outermost energy level of an atom
24. how plant and animal cells convert food into energy
25. A pure substance made of only one kind of atom
26. an element that has properties of both metals and nonmetals
27. The organic circulation of carbon from the atmosphere into organisms and back again
28. Provides insulation and protection for organs in the body

1. Largest number of individuals of a population that a environment can support
2. when plants take sun, CO2, and water and turn it into glucose
4. Helps with growth and repair of tissue and cells
5. A relationship between two organisms of different species where one benefits and the other is harmed
6. Group 1, 1 electron in outer level, very reactive, soft, silver, shiny
8. A series of steps in which organisms transfer energy by eating and being eaten
9. An organism that obtains energy by feeding on other organisms
11. chart of the elements showing the repeating pattern of their properties
15. A relationship between two organisms in which one organism benefits and the other is unaffected
17. This is used along with glucose to perform cellular respiration
18. Number of protons and neutrons in nucleus of an atom
21. a system of interlocking food chains.
23. The sugar that is created during photosynthesis