A physical blend of two or more substances is a _1_ A mixture has a composition that varies. Mixtures may be identified as __2_ or _3_Homogeneous mixtures are also known as _4_and have uniform properties. Any part of a sample with uniform composition and properties is called a_5_Many mixtures can be separated into their components by _6_methods. _7_is a method of separation that involves boiling a liquid, which is then condensed.

1. __________________________________

2. __________________________________

3. __________________________________

4. __________________________________

5. __________________________________

6. __________________________________

7. __________________________________

7. Classify a sample of matter as a substance or a mixture.

a. hand cream _____________ b. strawberry ________________ c. aluminum _________________

8. Further classify a sample of matter as homogeneous or heterogeneous

a. glue ________________ b. flower _________________ c. ink __________________

d. vegetable soup ________________ e. apple juice ________________

9. Classify changes in matter as physical or chemical changes.

a. bending a pipe ______________ b. boiling alcohol ______________ c. fireworks ______________

d. melting butter ______________ e. breaking a window______________ f. burning gasoline ______________

10. Tell whether each of the following is a mixture, a compound, or an element. Explain how you made your decision in each case.

	Element , Mixture of compound	Explanation supporting decision
a. hydrogen
b. table salt
c. uranium
d. carbon dioxide
e. sea water

11. A chemist heats some white crystals in a test tube. The crystals make a cracking sound, fall apart into smaller pieces, and give off a misty gas. A colorless liquid forms around the cooler top of the test tube. Tell whether you think the crystals are a compound or an element, and why.

12. State whether each of me following is a homogeneous or heterogeneous mixture.

a. oxygen dissolved in water ________________ b. carbon mixed with sand ________________

c. apple juice ________________ d. vegetable soup ________________

13. Car batteries give off a potentially explosive mixture of gases. What kind of change is taking place in the battery? What evidence do you have to support your decision?

14. Column A

_____ 1. volume

_____ 2. mass

_____ 3. substance

_____ 4. physical property

_____ 5. solid

_____ 6. liquid

_____ 7. gas

_____ 8. vapor

_____ 9. extensive property

_____ 10. mixture

_____ 11. heterogeneous mixture

_____ 12. solution

_____ 13. phase

_____ 14. distillation

_____ 15. filtration

_____ 16. element

_____ 17. compound

_____ 18. mixture

_____ 19. chemical symbol

_____ 20. chemical change

_____ 21. chemical reaction

_____ 22. reactants

_____ 23. product

_____ 24. chemical property

_____ 25. precipitate

Column B

A. a quality or condition of a substance that can be observed or measured without changing the substance’s composition

B. matter that takes both the shape and volume of its container

C. matter that has a uniform and definite composition

D. measure of the space occupied by an object

E. matter that has a definite volume and takes the shape of its container

F. a change to a material that does not change its composition

G. gaseous state of a substance that generally exists as a liquid or solid at room temperature

H. matter that has a definite shape and volume

I. the amount of matter that an object contains

J. depends on the type of matter in a sample

K. depends on the amount of matter in a sample

L. a mixture that has a uniform composition throughout

M. any part of a sample that has uniform composition and properties

N. a mixture that is not uniform in composition

O. separation of a liquid by boiling followed by condensation

P. another name for a homogeneous mixture

Q. a physical blend of two or more components

R. a method for separating a solid from a liquid in a heterogeneous mixture

S. substance that can be separated into simpler substances only by chemical means

T. a physical blend of two or more components

U. one or two letters that represent an element

V. simplest form of matter that has a unique set of properties

W. a change that produces matter with a different composition than the original matter

X. solid that forms and settles out of a liquid mixture

Y. starting substances in a chemical reaction

Z. ability of a substance to undergo a specific chemical change

AA. substance formed in a chemical reaction

BB. process in which one or more substances change into one or more new substances

16. Name and describe the three states of matter.

17. When 16 grams of methane gas combine with 64 grams of oxygen, 44 grams of carbon dioxide form, plus water. What mass of water is produced?

18. A liquid is allowed to evaporate and leaves no residue. Can you determine whether it was an element, a compound, or a mixture?

Do #1 -11 of the Standardized Test Prep on Page 61.