"Topic 6 Ecosystems": HTML5 Crossword

Across

1. an environment that provides the things a specific organism needs to live, grow and reproduce. (7)
5. all the different populations that live together in a certain area. (9)
11. the principle that the total amount of matter is neither created nor destroyed during any chemical or physical change. (3,2,12,2,4)
13. an environmental factor that causes a population to decrease in size. (8,6)
14. any form of water that falls from clouds and reaches Earth’s surface as rain, snow, sleet, or hail. (13)
16. a diagram that shows the amount of energy that moves from one feeding level to another in a food web. (6,7)
18. a series of events in an ecosystem in which organisms transfer energy by eating and by being eaten. (4,5)

Down

2. a living or once living part of an organism’s habitat. (6,6)
3. the change in state from a gas to a liquid. (12)
4. the community of organisms that live in a particular area, along with their nonliving environment. (9)
6. the rule that energy cannot be created or destroyed. (3,2,12,2,6)
7. an organism that gets energy by breaking down biotic wastes and dead organisms and returns raw materials to the soil and water. (10)
8. the process by which molecules at the surface of a liquid absorb enough energy to change to a gas. (11)
9. a living thing (8)
10. a nonliving part of an organism’s habitat. (7,6)
12. an organism that can make its own food. (8)
15. all the members of one species living in the same area. (10)
17. the pattern of overlapping feeding relationships or food chains among the various organisms in an ecosystem. (4,3)
19. an organism that obtains energy by feeding on other organisms. (8)