Unit 7 - Rocky Shores

6. feeders marine animals with organs that gather energy by straining
8. organisms that gather their energy from sunlight
9. a trait that helps an organism survive
10. in sea star locomotion and feeding
12. tide the point when seawater retreats to its lowest level during a tide cycle
14. threat anything that can cause harm to an ecosystem (e.g., pollution, deforestation, invasive species, overhunting, and climate change)
16. web food chains that overlap to form a network when organisms have more than one possible source of food
17. sharp extensions on the top of a sea star’s body that are used for protection
18. animals that feed on dead organisms
19. organisms that gather energy by eating other organisms
24. zone the region of land that is covered and uncovered by water between high and low tides

1. and small organisms out of the water (e.g., mussels, barnacles, sponges)
2. the transfer of heat through a medium
3. the place where land and water meet E7 Curriculum v. 1.5 Unit 7 –
4. organisms that contribute to the breaking down of dead organisms
5. drying due to the removal of water
7. the study of living things in their natural environment including the distribution of organisms in an ecosystem, the relationships between organisms, and interactions between energy and life
11. system a series of water-filled canals that
13. a community of organisms that rely on an exchange of resources with their physical environment and each other for survival
15. the alternating rise and fall of the sea with respect to land
20. plate an entrance for water into a sea star’s body
21. star a predatory animal (echinoderm) with five or more rays (arms) extending from a central disc
22. tide the point when seawater rises to its highest level during a tide cycle
23. any factor that reduces the ability of an organism to survive
25. feet small tubes on the mouth-side of a sea star that it uses to move and grasp surfaces or prey