Across
- 3. – a tentative and testable statement that must be capable of being supported or not supported by evidence
- 4. resources – natural resources that are used up at a rate faster than they can be replaced
- 5. – transfer of thermal energy, in a liquid or gas, in which the warmer substance rises and the cooler substance sinks; forms a current
- 13. – the enrichment of an ecosystem with chemical nutrients, typically compounds containing nitrogen, phosphorus, or both
- 14. – all of Earth’s air; divided into troposphere, stratosphere, mesosphere, thermosphere, and ionosphere
- 15. –all of the liquid, solid, and gaseous water on Earth
- 16. transformation – process of energy changing from one form to another
- 17. height above sea level or the earth's surface
Down
- 1. resources – natural resources that are constantly being recycled
- 2. – places where water is in frozen form, as well as areas of permafrost
- 6. – transfer of energy through matter by colliding particles (direct contact)
- 7. – all of Earth’s life forms as distributed in biomes, such as tundra, boreal forest, deciduous forest, grassland, desert, savannah, rainforest, chaparral, freshwater, and marine
- 8. – transfer of energy through the emission of electromagnetic waves
- 9. a form of oxygen gas, absorbs ultraviolet rays form the sun and then releases some of this energy in the form of heat.
- 10. pressure- The measure of the force with which air molecules push on a surface
- 11. –the core, mantle, and crust of the Earth
- 12. factors – an environmental factor that tends to limit population size