4 Written questions
4 Multiple choice questions
- Occurs after a disturbance in an already existing ecosystem. First species to appear are weeds/grasses.
- Free nitrogen can not be used so it has to become fixed. Bacteria perfoms this function.
- Driven by the sun. Changes from liquid to gas to liquid again.
- Animal that gets eaten.
3 True/False questions
Food Web → A food web has multiple (many) paths in which energy flows in an ecosystem. The arrow points in the direction energy goes!
Scavenger → Eats animals that are already dead.
Parasite → Survives by stealing energy off another animal