Across
- 2. an organism that mainly eats animals
- 4. a process in which one or more new substances form from one or more other substances
- 6. the transfer of energy caused by the circulation of matter due to differences in density
- 9. a long-term change in climate patterns on Earth, including changes in average global temperatures and the frequency of severe weather
- 12. a green pigment that is important in photosynthesis
- 13. a shorthand notation of one, two, or three letters that represent the name of the element
- 14. a shorthand notation made up of arrows and chemical formulas for reactants and products that summarizes what happens during a chemical reaction
- 18. a molecule used to store energy
- 20. the parts of Earth in which organisms are able to live
- 21. the variety of organisms on Earth or in a particular habitat or ecosystem
- 22. a large area of Earth characterized by certain physical conditions and the living things that are found there
- 23. the requirements that must be met for an engineering solution to be successful
- 24. a model that describes how carbon-based molecules move among Earth’s ecosystems and atmosphere
- 27. the types of elements that make up a substance, as well as the specific ratios of atoms of each kind of element that make it up
- 29. able to be broken down into smaller molecules by biological agents, such as bacteria
- 31. the mass of a single atom; all atoms of an element have approximately the same atomic mass.
- 32. the process of determining the approximate age of a rock, fossil, or event
- 33. the hypothesis that the continents slowly drifted to their current positions after having been part of a single, giant landmass that broke apart
- 34. a type of test that medical scientists perform to assess a medicine's effectiveness
Down
- 1. the material that forms the rigid walls and support for plant cells
- 2. the specific way in which the bonds and atoms are arranged within the molecules of a substance
- 3. the combined mass of the bodies of organisms, which collectively represents stored energy
- 5. the connection between atoms in more complex particles
- 7. the process that cells use to release the energy stored in sugars
- 8. to change state from a gas to a liquid
- 10. a solid structure whose atoms or molecules are arranged in a repeating, three-dimensional pattern
- 11. a relationship between two species in which one species benefits and the other is unaffected
- 12. a cell structure that uses the sun’s energy to make sugar through the process of photosynthesis
- 14. Earth’s hot, dense, innermost rock layer, located below the mantle
- 15. an individual particle of an element
- 16. an interaction between living things that need the same limited resource
- 17. an organism that gets energy and matter by eating or absorbing other organisms as food
- 18. the transfer of energy between objects that are touching; causes energy to move from the warmer object to the cooler object
- 19. a limitation on the range of possible solutions to a design
- 25. the change in state from a gas to a liquid
- 26. a material that is made from biomass and releases energy when it is burned
- 28. Earth’s thin, cool, and rigid outermost rock layer
- 29. the temperature at which a substance changes from a liquid to a gas as thermal energy is added to it
- 30. the limitations on an engineering solution