Science

4. An animal capable of living both on land and in water. They are cold-blooded and have smooth skin such as a frog, toad or salamander. They are hatched from an egg with the larva having gills that develop into lungs as the animal matures into an adult.
5. The path of energy in food from one organism to another; how energy goes from producers to consumers to decomposers.
8. A pyramid shaped structure that shows the flow of energy in an ecosystem.
11. Simple rootless plants that grow in sunlit waters in proportion to the amount of available nutrients. They can be one-celled or multi-cellular.
13. The process in green plants and certain other organisms by which carbohydrates are synthesized from carbon dioxide and water using light as an energy source.
14. Any type of relationship between organisms in an ecosystem.
15. A relationship in which 2 organisms benefit each other without either being harmed (flowers and bees, plover bird and crocodile).

1. Any of the fungi or bacteria that break down dead plants and animals into useful things like minerals and rich soil.
2. Refers to organisms being connected to one another in an ecosystem. There are relationships in which one population impacts another population in an ecosystem.
3. Any of the plants and algae that produce oxygen and food that animals need.
6. A relationship between two living organisms where one benefits and the other is not significantly harmed or helped. (One animal attaching to another animal for transportation only or using a second organism for housing, like orchids which grow on trees, or birds that live in holes in trees).
7. The overlapping food chains in an ecosystem.
9. A relationship in which one organism is benefited, but the other organism is harmed (fleas on dogs, ticks on animals, mistletoe in trees, mosquitos).
10. The degree of saltiness found in a body of water.
12. Organisms that cannot produce their own food and consume other organisms.