Vocab

5. variables-all other variables that are kept the same in a controlled experiment
7. found in the nucleus that has no charge
9. method- Series of steps that scientists follow to approach research
11. scientific explanation for a set of observations.
13. variable-the one variable that is altered
15. positively charged particle found in the nucleus of an atom
16. of Water (2.2)
19. experiment-An experiment where only one variable is changed.
23. pure substance that consists entirely of one type of atom
25. bonding-- weak attraction between a hydrogen atom and another atom
26. group-in a scientific experiment, group where no changes are made (used as a comparison group)
28. capacity (specific heat)-- the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C)
29. in a molecule, uneven distribution of electrons (results in (+) and (-) poles) ex. water
31. charged particle that orbits the nucleus in the electron cloud
32. attraction between molecules of the same substance

1. basic unit of matter
2. action-- tendency of water to rise in a thin tube
3. (chemistry definition) the center of an atom, which contains the protons and neutrons
4. mass-equal to the total number of protons and neutrons in the nucleus of an atom (based on isotopes)
6. force of attraction between different kinds of molecules
8. 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)
10. group-in a scientific experiment, group where independent variable is altered
12. interpretation based on what scientists already know
14. variable- the variable that changes in response to the independent variable (can have several)
17. symbol- one- or two-letter abbreviation for a chemical element name
18. using senses to collect information about your surroundings
20. a combination of 2 or more elements connected by bonds
21. 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
22. well-tested explanation unifies a broad range of observations
24. bond- type of bond between atoms in which the electrons are shared
27. electron- electron found in the outermost shell of an atom; helps to determine bonding
30. Organized way of gathering and analyzing evidence about the natural world