Physical Science

UNIT 1:

Safety, Scientific Method, and Measurement

Practice Test A

Objective 1–Students will convert between metric units.

Directions: Convert the following units to other units of the metric system. You must include the correct units in your answer. Answers without units and answers with incorrect units will be counted wrong.

Kilo – Hecto - Deka – Base – deci – centi - milli Base = (gram, Liter, meter, second)

ANSWER:

  1. 3.5 meters to millimeters ______
  1. 90 grams to kilograms______
  1. 2.7 milliseconds to seconds______
  1. 3,000,000 milligrams to kilograms ______
  1. 8.4 deciseconds to seconds______
  1. 0.000503 gigaliters to kiloliters______

Score Box:

A [] Correctly converted 6 units.
B [] Correctly converted 5 of the 6 units.
NY []

Objective 2–Demonstrate how to convert numbers into scientific notation and the other way around.

Convert the following into scientific notation:

  1. 0.000065

______

  1. 23,000

______

  1. 52

______

Convert the following into standard notation:

  1. 5.49 x 10−3

______

  1. 3.84 x 105

______

  1. 2.86 x 10−7

______

Score Box:

A [] Correctly converts all 6 numbers.
B [] Correctly converts 5 of the 6 numbers.
NY []

Objective 3: Identify how matter is classified.

Directions: Fill in the missing information in the concept map below byplacing the letter that appears beside term or descriptive phrase in the table where that term or phrase should appear in the concept map. Vocabulary terms (one or two words) will go in the boxes, descriptive phrases go on the lines. Each term or phrase is only used once – NOT ALL ANSWER CHOICES WILL BE USED: DO NOT REUSE THE TERMS OR PHRASES ALREADY PLACED IN THE CONCEPT MAP.

Terms
a. Compound / d Homogeneous / f. Mixture
b. Element / e. Matter / g. Pure substance
c. Heterogeneous
Descriptive Phrases
h. Chemical make-up is variable
i. Composition may vary in different areas; will eventually settle/separate
j. Only one type of atom
k. Set chemical formula
l. Two or more types of atoms chemically combined
m. Uniform composition throughout

Score Box:

A [] Correctly places all 9 missing terms/phrases.
B [] Correctly converts 8 of the 9 missing terms/phrases.
NY []

Objective 4: Classify a sample of matter as a pure substance or a mixture, as an element or a compound and as homogeneous or heterogeneous.

Directions: Classify each of the following as a pure substance (PS) or a mixture (M).

  1. NaCl____
  2. H2O + HCl____
  3. Dirt____

Directions: Classify each of the following as an element (E) or a compound (C).

  1. Iron____
  2. Co____
  3. CO____

Directions:Classify each of the following as homogeneous (HO) or heterogeneous (HE).

  1. A salt water solution____
  2. Muddy water____
  3. Air____

Score Box:

A [] Correctly identifies all 9 samples.
B [] Correctly identifies 8 of the 9 samples.
NY []

Objective 5: Graph, analyze and interpret heating and cooling curves.

Directions: Look at the following graph and determine the values of the melting point and boiling point of the substance. Also label the following parts of the graph: solid, liquid, gas.

Melting point value: ______

Boiling point value: ______

Is this a heating or cooling curve? ______

Score Box

A: Correctly determines the melting point and boiling point. Correctly labels the 3 states of matter on the curve and determines if graph is a heating or cooling curve. (6/6)
B: Incorrectly identifies or labels only one of the following: state of matter, boiling point, melting point, or type of curve (5/6).
NY

Objective 4: Interpreting phase changes and phase diagrams.

Directions: Match each of the following below with its corresponding phase change or state of matter. Not all answer choices will be used.

Question:Answers:

_____ 1. Particles are closely packed with little movement.A. Solid

_____ 2. solid to liquidB. Sublimation

_____ 3. liquid to solidC. Freezing

_____ 4. gas to solidD. Melting

_____ 5.solid to gasE. Deposition

_____ 6. Particles are far apart, move actively when heated.F. Liquid

G. Gas

H. Vaporization (boiling)

I. Condensation

A: 10/11 parts labeled correctly
B: 8/11 parts labeled correctly
NY