Across
- 3. the study of organisms in their environment
- 5. a group of organisms that feed on organic waste materials
- 8. the complete loss of a species from Earth
- 12. a greenhouse gas that is produced in cattle farming
- 14. the number of different species that live in an area
- 15. captive _______ is keeping animals in captivity and allowing them to breed, in order to increase the numbers in the population
- 16. the process where fossil fuels are burnt and release carbon into the atmosphere
- 17. the stage in a population growth curve where the population remains roughly constant is called the ______ phase
Down
- 1. a process of looking after the natural environment to maintain or increase the biodiversity of an area
- 2. an event caused by the addition of extra plant nutrients to water, resulting in a decrease in the concentration of dissolved oxygen
- 4. all of the populations of all the different species in an ecosystem
- 6. an area of ground covered by a single crop
- 7. an organism that gets its energy by eating plants
- 9. addition to the environment of something that harms it
- 10. the process of converting ammonium ions to nitrate ions
- 11. the animal that was featured in the last video Year 11-Science watched in 10th October 2023 Biology class.
- 13. the stage in a growth curve where the population grows at its maximum rate