Earth & Environmental Sciences
cinder cone
62%
human population
42%
lava flow
38%
volcanic eruption
35%
tephra
33%
land
23%
mulch
23%
crater
23%
fallout
19%
maize
16%
lava
12%
flow field
10%
ceramics
10%
volcano
10%
effect
9%
storage structure
9%
built structure
8%
arid land
7%
soil nutrient
6%
reworking
6%
subsistence
6%
shelter
6%
soil temperature
5%
growing season
5%
roof
5%
farm
5%
household
4%
soil moisture
4%
human activity
4%
decision making
4%
family
4%
phosphorus
4%
crop
4%
agriculture
4%
nutrient
3%
damage
3%
soil
2%
Physics & Astronomy
cones (volcanoes)
100%
lava
67%
volcanic eruptions
51%
sunset
31%
craters
23%
fallout
22%
soils
16%
volcanoes
15%
nutrients
13%
blankets
11%
arid lands
11%
flow distribution
8%
soil moisture
8%
shelters
8%
crops
7%
agriculture
7%
vents
7%
ceramics
7%
decision making
6%
roofs
6%
ballistics
5%
phosphorus
5%
deposits
4%
damage
3%
temperature
1%
Chemical Compounds
Mulch
29%
Flow
27%
Soil
17%
Nutrient
11%
Cinder
8%
Ceramic
8%
Surface Structure
5%
Phosphorus(.)
4%
Block Like Crystal
3%
Environment
2%
pH Value
2%
Surface
1%