Across
- 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
Down
- 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