Chapter 5

4. A substance made of two or more elements that are chemically combined in a set ratio.
5. The amount of matter in an object.
8. the study of matter and how matter changes
9. anything that has mass and takes up space
10. A force of attraction between two atoms
11. The basic particle from which all elements are made
12. The law of ______________ states that matter is not created or destroyed during a chemical or physical change.
15. A characteristic of a substance that describes its ability to change into different substances is a ________ property.
18. A(n) ___________ change absorbs energy.
20. A _________ mixture has parts that are easily seen and separated.
21. A measure of how hot or cold something is based on the average energy of motion of the particles.
24. A(n) ____________ change releases energy.
25. A substance that cannot be broken down into any other substances by chemical or physical means.

1. When the form or appearance of matter is altered but it is not changed into a new substance.
2. Uses numbers and symbols to show the ratio of elements in a compound.
3. A ___________ mixture has parts that are so evenly mixed that they are difficult to see and separate.
6. a single kind of matter that is pure, meaning it always has a specific chemical composition
7. A change in matter that produces one or more new substances.
10. Energy that is stored in chemical bonds.
13. The total energy of motion of all the particles in a substance.
14. a characteristic of a substance that can be observed without changing it into another substance is a _______ property.
16. Two or more substances that are in the same place, but not chemically bonded together.
17. The amount of space that matter occupies.
19. A measure of the amount of mass in a given volume.
22. A group of two or more atoms held together by chemical bonds.
23. A measure of the force of gravity acting on an object.