Physics & Astronomy
plates (tectonics)
100%
Earth mantle
45%
asthenosphere
35%
water
32%
magma
28%
protoplanets
24%
oceans
20%
solidification
17%
water loss
15%
habitability
14%
lakes
12%
hydrates
11%
extrasolar planets
10%
solar system
9%
drying
9%
minerals
9%
histories
7%
melting
7%
viscosity
6%
atmospheres
6%
heat
6%
defects
5%
Engineering & Materials Science
Tectonics
83%
Earth (planet)
48%
Water
31%
Solidification
15%
Extrasolar planets
15%
Radioisotopes
10%
History
9%
Lakes
9%
Solar system
9%
Hydrates
9%
Minerals
8%
Drying
7%
Melting
7%
Viscosity
6%
Defects
5%
Hot Temperature
3%
Mathematics
Water
57%
Accretion
25%
Solidification
21%
Ocean
20%
Extrasolar Planets
15%
Drying
11%
Melting
10%
Atmosphere
10%
Defects
8%
Likely
8%
Heat
7%
Viscosity
7%
History
7%
Internal
6%
Sufficient
6%
Necessary
5%
Partial
5%
Model
2%
Medicine & Life Sciences
Water
38%
Oceans and Seas
18%
Planets
12%
Lakes
10%
Atmosphere
9%
Solar System
9%
Viscosity
8%
Radioisotopes
8%
Freezing
8%
Minerals
7%
Hot Temperature
6%
History
6%