Earth Science
Unit	Count
Observation and Measurement	51
The Changing Environment	36
Measuring the Earth	192
The Earth in Space	466
Energy in Earth Processes	122
Insolation and Earth Energy	117
Meteorology	303
Moisture, Energy, and Climate	184
Weathering and Erosion	46
Erosional-Depositional Systems	256
Rocks and Minerals	274
The Dynamic Earth	286
The History of the Earth	319
Landscape Development	116
Advanced Topics	48
TOTAL	2816
Unit	Count	Section
Observation and Measurement	10	Percent Error
	3	Experimental Control
	27	Density
	4	Classification
	7	Observation and Inverence
The Changing Environment	9	Water Pollution
	16	Environmental Change
	11	Cyclic Patterns
Measuring the Earth	31	Spheres of the Earth
	16	Size and Shape of the Earth
	52	Locating Positions on the Earth
	26	Fields
	67	Topographic Maps
The Earth in Space	118	Terrestrial Motions
	72	The Apparent Path of the Sun
	57	Orbital Motions
	79	The Moon
	6	Apparent Motions of Celestial Objects
	6	Time and Earth Motions
	58	The Planets
	47	Beyond the Solar System
	23	Formation, Evolution, and Measurement of Stars
Energy in Earth Processes	39	Electromagnetic Energy and Energy Absorption
	36	Heat Transfer
	11	Specific Heat
	36	Phase Change
Insolation and Earth Energy	24	Land and Water Temperatures
	33	Earth's Energy Budget
	60	Insolation
Meteorology	48	Adiabatic Changes and Cloud Formation
	60	Air Masses and Fronts
	100	Atmospheric Variables
	70	Weather Maps
	25	Station Models
Moisture, Energy, and Climate	95	Climates
	83	The Water Cycle and Soil Water Movement
	6	Local Water Budgets
Weathering and Erosion	27	Weathering
	7	Rock Abrasion
	12	Soil Formation
Erosional-Depositional Systems	70	Deposition of Sediments
	96	Running Water
	7	Wind
	53	Glaciers
	24	Waves and Shorelines
	5	Gravity and Mass Wasting
	1	Groundwater
Rocks and Minerals	35	Metamorphic Rocks
	84	Mineral Properties and Identification
	63	Igneous Rocks
	72	Sedimentary Rocks
	20	The Rock Cycle
The Dynamic Earth	59	Structure of Earth
	26	Crustal Change
	91	Earthquakes
	110	Plate Tectonics and Continental Drift
The History of the Earth	87	The Rock Record
	62	Absolute Dating
	38	Evolution of Life
	89	Relative Dating and Structure Diagrams
	22	Fossil Correlation
	21	Fossils
Landscape Development	37	Landscape Characteristics
	34	Landscape Regions
	30	River Drainage Patterns
	6	Climatic Effects
	9	Bedrock and Soil
Advanced Topics	5	Measuring the Earth
	8	The Earth in Space
	9	Energy in Earth Processes
	6	Meteorology
	20	Moisture, Energy, and Climate
Theme	Count
Models	72
Measurements and Calculations	316
Motions	87
Energy and Temperature	167
Change	275
Relationships	165
Observations and Inferences	977
Stewardship	5
Reading Graphs and Diagrams	752
Level	Count
Basic	1518
Intermediate	970
Advanced	328
Attribute	Count
Graph	349
Table	170
Chart	125
Diagram	942
Map	486
Calculation	142
Apparatus	47
Photograph	40
Spanish Translations	1407