Across
- 2. Permanently frozen soil
- 7. Nuclear ___?___ is fusing two isotopes together to form a heavier nucleus
- 9. A permanent change in a gene
- 13. An energy source that uses the kinetic energy of moving water
- 15. ___?___ selection is when humans breed individual organisms for specific traits
- 16. ___?___ cells convert solar energy to electricity
- 18. Genetic ___?___ is directly altering DNA using technology
- 19. Carbon ___?___ store carbon. For example: forests
- 20. A ___?___ point is a point at which there has been enough change that undoing the change is impossible or very difficult
- 23. ___?___ isolation is when groups of a population become physically isolated
- 24. Getting 2 or more forms of energy from the same source
- 25. A ___?___ solar heating system absorbs and stores heat from the sun directly within a well-insulated structure
- 26. The dirtiest fossil fuel
- 27. Gaseous or liquid fuels formed from biomass
- 30. ___?___ diversity is the number of species in an area and their abundance
- 31. When one species splits into two or more species
- 32. Global ___?___ is global increase in average temperature
- 33. An ___?___ solar heating system captures energy from the sun in a heat-absorbing fluid
- 34. ___?___ reproduction makes new gene combinations in offspring
- 35. Units of heredity
- 37. ___?___ selection is where individuals better suited to an environment are more likely to pass genes on
- 38. Nuclear ___?___ is using a neutron to split a large nucleus into two or more smaller nuclei
- 41. ___?___ energy is energy from heat inside Earth
- 42. ___?___ power is the least expensive and least polluting source of energy when all factors are considered
Down
- 1. ___?___ diversity is the variety of genes in a population
- 3. ___?___ extinction is when there is a significant rise in extinction rate
- 4. The variety of life on Earth
- 5. Climate change ___?___ involves minimizing or stopping the increase in greenhouse gases in the atmosphere
- 6. ___?___ diversity is diversity in niches
- 8. An energy source that is 50-90% methane. 2 words, no spaces
- 10. Energy ___?___ is how much useful work we get from each unit of energy
- 11. A trait that helps an individual survive and reproduce
- 12. Gene ___?___ is when genes enter and exit a population as individuals migrate
- 14. Genetic ___?___ is change in gene frequencies due to random chance
- 17. ___?___ energy is the total amount of useful energy available from a resource minus the energy needed to make the energy available to consumers
- 19. ___?___ selection is a part of natural selection where individuals choose mates based on individual preferences
- 21. ___?___ gases absorb the heat of solar radiation in Earth's atmosphere
- 22. ___?___ isolation is when natural selection operates independently between populations or groups of a population
- 25. In a ___?___ feedback loop, a change causes more of the same change
- 28. A synonym of "crude oil"
- 29. Ice ___?___ contain bubbles of ancient atmosphere
- 36. The permanent loss of a species
- 39. A shortening of "hydraulic fracturing." Involves horizontal drilling in and then blasting apart shale rock
- 40. ___?___ energy is naturally replenished