Physics & Astronomy
rocks
100%
acids
93%
silicon dioxide
79%
deposits
26%
precipitates
25%
igneous rocks
25%
water
25%
Columbia (Orbiter)
22%
oxides
18%
mars
17%
craters
16%
freezing
15%
minerals
14%
silicates
14%
dissolving
13%
evaporation
11%
saturation
10%
causes
9%
temperature
4%
Earth & Environmental Sciences
silica
82%
acid
65%
chemical
51%
rock
50%
oxide
22%
phyllosilicate
17%
ultramafic rock
16%
igneous rock
14%
crater
14%
Mars
13%
water
13%
freezing
13%
modeling
12%
silicate
12%
evaporation
11%
dissolution
11%
saturation
10%
mineral
8%
temperature
5%
Chemical Compounds
Amorphous Material
47%
Ferric Oxide
44%
Flow
44%
pH Value
43%
Acid
36%
Evaporation
30%
Mineral
27%
Dissolution
25%
Oxide
18%
Surface
11%