Temperature

Unit 2 Question Packet Name …………………KEY………………………
Matter & Energy Period ………….

Skills 1. classifying types of matter 2. interpreting particle diagrams 3. identifying physical & chemical properties of matter

4. separating Mixtures 5. converting Temperatures 6. identifying physical & chemical changes in matter
Skill #1: Classifying types of matter - refer to your notes and RB p. 1-2

Classify each of the following with the combination of terms listed below. pure substance – element mixture – homogeneous pure substance – compound mixture – heterogeneous

1. HCl (aq) mixture – homogeneous 2. sugar pure substance – compound

3. KBr (s) pure substance – compound 4. soil mixture – heterogeneous

5. Cl2 (g) pure substance – element 6. water pure substance – compound

7. CH2(OH)2 (aq) mixture – homogeneous 8. sodium pure substance – element

9. Hg (l) pure substance – element 10. iron oxide pure substance – compound

11.NH3 (l) pure substance – compound 12. salt water mixture – homogeneous

13. Matter that is composed of two or more different elements chemically combined in a fixed proportion is classified as (1) a compound (2) an element (3) a mixture (4) a solution

14. A compound differs from an element in that a compound 1) is homogeneous (3) has a definite composition 2) has a definite melting point (4) can be decomposed by a chemical reaction

15. A compound differs from a mixture in that a compound always has a (1) homogeneous composition (3) minimum of three elements (2) maximum of two elements (4) heterogeneous composition

16. A heterogeneous material may be 1) an element (2) a compound (3) a pure substance (4) a mixture

17. Which statement is an identifying characteristic of a mixture? (1) a