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100+ Free AEPA Earth Science AZ045 Practice Questions

Pass your Arizona Educator Proficiency Assessments Earth Science (AZ045) exam on the first try — instant access, no signup required.

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Key Facts: AEPA Earth Science AZ045 Exam

AZ045

Current AEPA Code

AEPA tests list

100

Selected-Response Questions

AEPA Earth Science AZ045 test page

2h 30m

Testing Time

AEPA Earth Science AZ045 test page

240

Passing Score

AEPA Earth Science AZ045 test page

$119

Test Fee

AEPA Earth Science AZ045 test page

22 / 17 / 22 / 22 / 17

Official Subarea Weights

AEPA Earth Science study guide

AEPA Earth Science is currently listed by AEPA as test code AZ045, replacing older references that may show NT307. The official Earth Science test page lists a computer-based assessment with 100 selected-response questions, a posted fee of $119, a passing score of 240, and 2 hours and 30 minutes of testing time within a 2-hour-45-minute appointment. The official study guide weights the test as Characteristics of Science 22%, Origin and Evolution of the Earth System 17%, Geologic Materials, Processes, and Cycles 22%, The Hydrosphere and the Atmosphere 22%, and Astronomy 17%. This free 100-question bank mirrors those official weights with original practice items and explanations.

Sample AEPA Earth Science AZ045 Practice Questions

Try these sample questions to test your AEPA Earth Science AZ045 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which statement best distinguishes a scientific theory from a scientific law in Earth and space science?
A.A theory explains why patterns occur, while a law describes a consistent pattern or relationship.
B.A theory becomes a law after it has been tested for many years.
C.A law is a guess, while a theory is an untested explanation.
D.A theory applies only in laboratories, while a law applies in nature.
Explanation: A scientific theory is a well-supported explanatory framework, such as plate tectonics explaining earthquakes, volcanism, and mountain building. A scientific law describes a regular relationship, such as a mathematical relation, without necessarily explaining the underlying mechanism.
2The eventual acceptance of plate tectonics depended most directly on which new line of twentieth-century evidence?
A.Discovery that continents have different climates
B.Mapping of symmetrical magnetic stripes on both sides of mid-ocean ridges
C.Observation that rivers erode valleys over time
D.Recognition that the Moon affects ocean tides
Explanation: Symmetrical magnetic stripes record reversals of Earth's magnetic field as basalt forms at spreading ridges, providing strong evidence for seafloor spreading. That evidence supplied a mechanism that Wegener's original continental-drift proposal lacked.
3Ice-core studies of past climate most clearly show how Earth science uses which other discipline?
A.Organic chemistry, because pollen grains are converted into petroleum in ice
B.Analytical chemistry, because trapped gases and isotope ratios are measured to infer past atmospheric conditions
C.Classical mechanics, because all climate information comes from orbital speed alone
D.Human anatomy, because ice cores preserve complete animal bodies
Explanation: Ice cores preserve bubbles of ancient air and isotope ratios that can be analyzed chemically to reconstruct past temperature and atmospheric composition. This is a clear example of Earth science depending on chemistry and measurement technology.
4Which question is most directly testable through a school-based Earth science investigation?
A.Is sandstone more beautiful than shale?
B.Does increasing stream-table slope increase the rate of sediment transport?
C.Should every city ban development near rivers?
D.Was the first volcano frightening to nearby people?
Explanation: A stream-table investigation can vary slope and measure sediment movement, making the question testable with empirical data. The other choices involve opinions, policy judgments, or historical emotions that cannot be tested directly in this way.
5A class investigates whether soil particle size affects infiltration rate. Which variable should be measured as the dependent variable?
A.The type of container used for all samples
B.The amount of water poured onto each sample
C.The elapsed time or rate at which water passes through each soil sample
D.The starting temperature of the classroom
Explanation: The dependent variable is the outcome measured in response to the manipulated factor. If particle size is changed, infiltration rate or elapsed drainage time is the logical response variable.
6A researcher compares erosion from two identical trays of sand, one with grass cover and one without. Which condition is most important to keep constant?
A.The amount and intensity of simulated rainfall applied to both trays
B.The color of the ruler used to measure erosion
C.The brand of notebook used to record observations
D.The day of the week on which the trays are tested
Explanation: Rainfall amount and intensity strongly affect erosion, so they must be controlled to isolate the effect of vegetation cover. Without that control, differences in erosion could be caused by rainfall rather than grass.
7Which sampling plan would best estimate the average grain size across a beach?
A.Collect one sample from the easiest spot to reach.
B.Collect samples at evenly spaced points along several transects from the dunes to the swash zone.
C.Collect only the largest visible pebbles near the parking area.
D.Ask visitors which part of the beach seems sandiest.
Explanation: Systematic sampling along multiple transects captures variation across the beach and reduces location bias. It provides a more representative data set than convenience or opinion-based sampling.
8A student records daily high temperature for a city over one calendar year. Which graph best shows the seasonal pattern in the data?
A.A line graph with date on the x-axis and temperature on the y-axis
B.A pie chart showing the percentage of days in each month
C.A geologic cross section through the city
D.A histogram with no time information
Explanation: A line graph displays change through time and makes seasonal warming and cooling patterns visible. Time-series temperature data are best interpreted with date ordered along the horizontal axis.
9On a topographic map, contour lines are closest together along the east side of a hill and widely spaced on the west side. What does this indicate?
A.The east side has the steeper slope.
B.The west side has higher elevation everywhere.
C.The east side is older rock.
D.The west side receives more sunlight.
Explanation: Closely spaced contour lines indicate rapid elevation change over a short horizontal distance, which means a steeper slope. Widely spaced contours indicate a gentler slope.
10Four rainfall measurements for one storm are 10 mm, 12 mm, 14 mm, and 44 mm. Which statistic best describes the typical value if the 44 mm reading is suspected to be an outlier?
A.Mean
B.Median
C.Range
D.Maximum
Explanation: The median is resistant to extreme values and better represents the center when an outlier may be present. The mean would be pulled upward by the 44 mm measurement.

About the AEPA Earth Science AZ045 Exam

AEPA Earth Science (AZ045) is an Arizona custom educator certification test for Earth science subject knowledge. The official study guide organizes the 100 selected-response exam into five weighted subareas: Characteristics of Science; Origin and Evolution of the Earth System; Geologic Materials, Processes, and Cycles; The Hydrosphere and the Atmosphere; and Astronomy.

Assessment

100 selected-response questions across five official content subareas

Time Limit

2 hours 30 minutes testing time; 2 hours 45 minutes total CBT appointment

Passing Score

240 scaled score

Exam Fee

$119 (Arizona Department of Education / Pearson (AEPA))

AEPA Earth Science AZ045 Exam Content Outline

22%

Characteristics of Science

Historical and contemporary Earth and space science contexts, contributions from different people and periods, the nature of science, scientific inquiry, investigation design, sampling, variables, controls, maps, models, graphs, descriptive statistics, spatial reasoning, technology, everyday applications, natural hazards, water scarcity, pollution, climate, and science-society-policy connections.

17%

Origin and Evolution of the Earth System

Evidence for Earth's age, chemical and physical Earth layers, internal and external energy sources, formation of continental and oceanic crust, oceans and atmosphere through time, Earth's magnetic field, evidence and mechanisms of plate tectonics, supercontinents, subduction and accretion, crustal deformation, ocean-basin evolution, relative dating, radiometric dating, geologic time, fossils, climate history, origin and evolution of life, weathering, erosion, deposition, soils, and landscape evolution.

22%

Geologic Materials, Processes, and Cycles

Atomic structure, isotopes, radioactive decay, chemical bonding, water properties, mineral identification, major mineral groups, rock identification, igneous, sedimentary, and metamorphic rock formation, volcano types and eruption styles, plate-tectonic controls on igneous activity, magma origins, earthquake causes, seismic waves, faulting, earthquake location and magnitude, geochemical cycling among Earth spheres, the carbon cycle, nitrogen, phosphorus, oxygen, ore formation, and energy resources.

22%

The Hydrosphere and the Atmosphere

Watersheds, wetlands, lakes, streams, river systems, aquifers, groundwater-recharge relationships, southwestern and global water quantity and quality, freshwater management and conservation, atmospheric layers and composition, ozone, radiation, convection, conduction, aerosols, air pollution, seasons, global circulation, Coriolis effect, climate controls, ENSO, monsoons, jet streams, air masses, greenhouse gases, weather systems, severe weather, weather maps, station models, ocean-water chemistry, surface currents, thermohaline circulation, waves, coastal processes, tsunamis, and human effects on oceans.

17%

Astronomy

Earth and Moon motions, solar and lunar eclipses, day length, tides, Moon phases, apparent motions of celestial objects, solar structure, solar evolution and energy production, solar activity, solar-system formation from the solar nebula, planets, asteroids, comets, gravity, Kepler's laws, celestial sphere, star types and life cycles, H-R diagram, stellar spectra, star distances and motion, galaxy types and the Milky Way, Big Bang theory, cosmic inflation, Hubble's law, telescopes, dark matter, and dark energy.

How to Pass the AEPA Earth Science AZ045 Exam

What You Need to Know

  • Passing score: 240 scaled score
  • Assessment: 100 selected-response questions across five official content subareas
  • Time limit: 2 hours 30 minutes testing time; 2 hours 45 minutes total CBT appointment
  • Exam fee: $119

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

AEPA Earth Science AZ045 Study Tips from Top Performers

1Study by the official weights: Characteristics of Science, Geologic Materials, and Hydrosphere/Atmosphere together make up 66% of the test.
2Practice reading maps, station models, graphs, cross sections, geologic columns, H-R diagrams, and data tables because many Earth science questions test interpretation rather than isolated recall.
3Connect plate tectonics to landforms, earthquakes, volcanoes, rock formation, ocean-basin history, hazards, and resource distribution.
4For weather and climate, separate short-term weather processes from long-term climate controls, then practice applying pressure gradients, Coriolis effect, moisture, altitude, latitude, and ocean-current reasoning.
5For dating and Earth history, distinguish relative dating principles from radiometric dating and know how index fossils, unconformities, and cross-cutting relationships are used.
6For astronomy, master Earth-Moon-Sun geometry, Kepler's laws, stellar spectra, H-R diagram patterns, and the evidence for the Big Bang.

Frequently Asked Questions

What is the current AEPA test code for Earth Science?

The official AEPA tests list currently identifies Earth Science as AZ045. This metadata uses AZ045 even though older or missing-exam references may show Earth Science as NT307.

How many questions are on AEPA Earth Science AZ045?

The official AEPA Earth Science test page lists 100 selected-response questions. The official study guide divides those questions across five weighted subareas.

How long is the AEPA Earth Science exam?

The official test page lists a total computer-based appointment time of 2 hours and 45 minutes, including 15 minutes for the CBT tutorial and nondisclosure agreement and 2 hours and 30 minutes of testing time.

What score do I need to pass AEPA Earth Science?

The official AEPA Earth Science test page lists a passing score of 240 on the AEPA scaled-score system.

How much does AEPA Earth Science AZ045 cost?

The official Earth Science test page lists the test fee as $119. Candidates should confirm the final checkout total during registration in case payment policies or optional materials change.

Are reference materials provided for AEPA Earth Science?

The official test page states that no reference materials are provided for the Earth Science test, so candidates should be comfortable with core relationships, maps, diagrams, and standard Earth science vocabulary without a formula sheet.