Unit 1 Vocabulary

2. Anything that has mass and takes up space.
5. The central core of an atom containing protons and neutrons.
8. The amount of space a substance or object occupies.
9. What is perceived with the 5 senses.
13. A mixture where the composition is uniform throughout. The components are evenly distributed and not seen (like Kool-Aid).
14. Building blocks of matter.
15. The variable changed in an experiment. Found on the X-axis of a graph.
18. A measure of how much mass is in a given volume (how compact a substance is).
19. Subatomic particle with a negative electrical charge that orbits the atom's nucleus.
20. Electrons located in the outermost shell of an atom.
22. One of the four states of matter, that is similar to a gas but composed of electrically charged particles.
23. The temperature at which a solid substance changes to a liquid state.
24. One of the four states of matter. Has ability to flow and conform to the shape of its container, while maintaining a relatively constant volume.
26. A pure substance that cannot be broken down into simpler substances by chemical means.
28. The mass of an atom.
29. The variable observed in an experiment. Found on the Y-axis of a graph.
30. The measure of the amount of matter in an object.
32. A testable, educated guess.

1. ANY basic unit of matter or nonmatter.
3. The internal energy/temperature, specifically the movement of particles within a substance.
4. A group of two or more (same or different) atoms bonded together. H2O is an example.
6. A substance formed when two or more different elements are chemically bonded.
7. Presence of more protons than electrons.
10. The components that make up an atom: protons, neutrons, and electrons.
11. A conclusion reached on the basis of evidence and reasoning.
12. No net electrical charge because the number of positive protons is equal to the number of negative electrons.
16. Subatomic particle in the nucleus with a positive charge.
17. A mixture where the components are not evenly distributed and have visibly different parts (like sand and water).
21. Subatomic particle in the nucleus with no electric charge (neutral)
25. Presence of more electrons than protons.
27. One of the four states of matter. No fixed shape or volume.
31. One of the four states of matter. Has definite shape and volume with closely packed atoms or molecules.