Across
- 3. mass-equal to the total number of protons and neutrons in the nucleus of an atom (based on isotopes)
- 4. interpretation based on what scientists already know
- 7. action-- tendency of water to rise in a thin tube
- 10. method- Series of steps that scientists follow to approach research
- 18. bonding-- weak attraction between a hydrogen atom and another atom
- 19. charged particle that orbits the nucleus in the electron cloud
- 20. attraction between molecules of the same substance
- 21. group-in a scientific experiment, group where independent variable is altered
- 22. symbol- one- or two-letter abbreviation for a chemical element name
- 24. well-tested explanation unifies a broad range of observations
- 27. force of attraction between different kinds of molecules
- 28. Organized way of gathering and analyzing evidence about the natural world
- 30. basic unit of matter
- 31. capacity (specific heat)-- the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C)
- 33. variable- the variable that changes in response to the independent variable (can have several)
Down
- 1. number-the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table (also equals the number of electrons in an element)
- 2. review-an expert analysis of experimental results, completed to allow for other scientists to look for flaws, re-test results, and evaluate validity of the results
- 5. (chemistry definition) the center of an atom, which contains the protons and neutrons
- 6. variables-all other variables that are kept the same in a controlled experiment
- 8. variable-the one variable that is altered
- 9. found in the nucleus that has no charge
- 11. a combination of 2 or more elements connected by bonds
- 12. scientific explanation for a set of observations.
- 13. of Water (2.2)
- 14. is Science? (Sections 1.1 & 1.2)
- 15. in a molecule, uneven distribution of electrons (results in (+) and (-) poles) ex. water
- 16. electron- electron found in the outermost shell of an atom; helps to determine bonding
- 17. group-in a scientific experiment, group where no changes are made (used as a comparison group)
- 20. experiment-An experiment where only one variable is changed.
- 23. using senses to collect information about your surroundings
- 25. pure substance that consists entirely of one type of atom
- 26. positively charged particle found in the nucleus of an atom
- 29. bond- type of bond between atoms in which the electrons are shared
- 32. of Matter (section 2.1)