Across
- 2. of Conservation of Matter, states that whenever matter undergoes a physical or chemical change, no atoms are created or destroyed
- 5. forms of an element that have the same atomic number, but different mass numbers due to a varying amount of neutrons
- 7. Theory, one of the most important and certain results of science, based on a large body of evidence
- 9. Loop, occurs when an output of matter, energy, or information is fed back into the system as an input and it leads to changes in that system
- 10. a third building block of some types of matter, it is an atom or group of atoms with a charge (positive or negative)
- 11. Law of Thermodynamics, when energy changes from one form to another, it always goes from a more useful form to a less useful form
- 13. compound, a carbon based compound
- 15. Law, a well-tested and widely accepted description of observations that have been repeated many times in a variety of conditions.
- 16. Energy, or heat, is another form of kinetic energy
- 17. a measure of acidity that is based on the comparative amounts of hydrogen ions and hydroxide ions in the solution
- 18. anything that has mass and takes up space
- 20. Law of Thermodynamics, this scientific law states the total amount of energy does not change when energy is converted from one form to another in a physical or chemical change
- 23. Review, a process where scientists review each other's work
- 24. Tipping Point, when a natural system becomes locked into a positive feedback loop, beyond this point the system can change so drastically that it suffers from severe degradation or collapse
- 25. Radiation, is another form of kinetic energy where energy travels as waves
- 26. a physical or mathematical representation of a structure or system
Down
- 1. a set of components that function and interact in some regular way
- 3. is the basic building block of matter
- 4. Hypothesis, is a possible and testable answer to a scientific question or explanation of what scientists observe in nature
- 6. Methods, or practices, used to advance knowledge and understanding of how the natural world works
- 8. combinations of two or more different elements held together in fixed proportions
- 12. Energy, is stored and potentially available for use
- 14. Change, or chemical reaction, when a chance in chemical composition occurs
- 17. Change, when no change in its chemical composition occurs
- 18. the second building block of matter, which is a combination of two or more atoms of the same or different elements held together by forces known as chemical bonds
- 19. Energy, energy associated with motion
- 21. a broad field of study focused on discovering how nature works and using that knowledge to describe what is likely to happen in nature
- 22. is a type of matter with a unique set of properties that cannot be broken down into simpler substances by chemical means
- 27. information collected to test a hypothesis