Earth and Planetary Sciences
Coal
100%
Investigation
89%
Model
78%
Region
67%
Kentucky
66%
Analytical Method
57%
Show
39%
United States of America
38%
Sample
34%
Observation
33%
State
29%
Implication
29%
China
28%
Variation
27%
Emissions
27%
Lake
26%
Ash
25%
Sediment
24%
Calculation
24%
Petrography
24%
Approach
23%
Collision
23%
Experiment
21%
Rate
20%
Order
20%
History
20%
Behavior
19%
Dependence
19%
United States
19%
Utilization
19%
Evaluation
19%
Proton
18%
Rare Earth Element
18%
Correlation
17%
Bed
17%
Spin
17%
Spectra
17%
Depth
17%
Water
16%
Wave
16%
River
16%
Groundwater
16%
Species
16%
Minerals
15%
Estimate
15%
Record
15%
Gas
15%
Impact
15%
Geochemistry
15%
Plant
15%
Maps
14%
Quark
14%
Core
14%
Cartography
14%
Rock
14%
Electron
14%
Research
14%
Variability
14%
Fault
14%
Tectonics
14%
Maceral
14%
Comparison
13%
Prediction
13%
Information
13%
Landscape
13%
Pennsylvanian
13%
Particles
12%
Carbon
12%
Report
12%
Soils
12%
Position (Location)
12%
Exhibit
12%
Content
12%
Deformation
11%
Average
11%
Speed
11%
Characterization
11%
Survey
11%
Momentum
11%
Occurrence
11%
Spectrometer
11%
Mining
10%
Size
10%
Mountains
10%
Magnitude
10%
Holocene
10%
Aquifer
10%
Agreement
10%
Amount
10%
Mineralogy
9%
Deposit
9%
Set
9%
Earthquake
9%
Metal
9%
Climate
9%
Communities
9%
Rill
9%
Metropolitan Area
9%
Active Galactic Nuclei
9%
Vitrinite
8%