Across
- 5. a method of controlling unwanted pests by using a natural predator or disease
- 8. vegetation native vegetation that remains unchanged when surrounding areas have been changed by activities such as grazing or forestry
- 9. a consumer that eats only other animals
- 10. species that are close to extinction and very small numbers remain
- 12. area along the banks of rivers and streams that is flooded when water levels are high
- 13. the place where an organism lives
- 15. a scientist who studies the growth of plants
- 17. an interaction between two organisms in which one of them benefits but the other one is not affected
- 20. term used to describe a species that has not been seen in the wild for over 50 years, and of which the last known individual has died
Down
- 1. times of the year when fires are most likely to occur
- 2. species that is experiencing a rapid population decline and is in danger of becoming extinct if the drop in numbers continues
- 3. characteristics that help an organism to survive in its environment
- 4. living factors in the environment
- 6. the chemical in plants that traps energy from the Sun and gives plants their green colour
- 7. the term used to describe all the conditions that affect a plant or animal in its habitat
- 11. a system formed by organisms interacting with each other and with their non-living surroundings in a balanced way
- 14. the place where all life exists; consists of Earth and its atmosphere
- 16. species that have low numbers often spread out over a large area; the population is not decreasing
- 18. factors non-living factors in the environment
- 19. scientists who study the interactions between living things and their environment