Science Vocab 2

2. the building block of all matter; consists of protons, electrons,and usually neutrons.
3. the force of gravity acting on the matter in an object.
4. a physical combination of two or more substances in a changeable ratio.
8. the measure of the amount of matter in an object
11. a mixture that has a uniform appearance throughout also known as a solution, especially of a solid dissolved in a liquid.
12. a pure substance consists of atoms with the same atomic number.
14. a model that states that all physical matter exists in the form of particles.
15. a pure substance consisting of atoms of to or more elements that are chemically combined in a fixed ratio.
16. the state of matter in which particles are far apart, move rapidly, and have little interaction with each other.
18. the state of matter in which particles are close together but able to move around.
19. the mass per unit volume of an object.

1. the law that states that the masses of chemical substances combine in definite, characteristic integer ratios when forming compounds.
5. a particle consisting of two or more atoms covalently bonded together.
6. a material made of only one kind of element or compound.
7. anything that has matter and occupies space.
9. the space enclosed to occupied by an object.
10. a mixture that does not have a uniform appearance since the combined substances are unevenly distributed.
13. a gas-like state of matter, formed at very high temperatures, that consists of high-energy ions and free electrons.
17. the state of matter in which particles vibrate in fixed position, giving substances a fixed shape and volume.