Question

layer average density (g/cm³) composition (what is it made out of) average temperature (°c) 1 freshwater hydrosphere 1g/cm³ h₂o 1.7→41.2°c 2 stratosphere 0.0001g/cm³ n₂ and o₂ -51°→ -15°c 3 inner core 12.9g/cm³ iron and nickel 4 cryosphere/water ice 0.917g/cm³ water, snow, ice, frozen ground 5 thermosphere 0.00000001g/cm³ o, n, he 6 upper asthenosphere (mantle) 3.3g/cm³ 7 oceanic (salt water) hydrosphere 1.026g/cm³ 8 troposphere 0.001225g/cm³ 9 outer core 11g/cm³ 10 continental lithosphere (crust) 2.7g/cm³ 11 exosphere 0.000000000001g/cm³ 12 lower asthenosphere (mantle) 3.4g/cm³ 13 oceanic lithosphere (crust) 3g/cm³ 14 mesosphere 4.5g/cm³

Explanation:

Since no specific question is provided about this table (like calculating density differences, identifying a layer's properties, etc.), it's hard to proceed with a solution. If you want to analyze the data (e.g., find the layer with the highest density, complete a missing composition/temperature, convert units), please specify the task. For now, if we assume a common task like finding the layer with the highest average density:

Step1: List all density values

Freshwater Hydrosphere: $1\ g/cm^3$, Stratosphere: $0.0001\ g/cm^3$, Inner Core: $12.4\ g/cm^3$ (note: unit here is $g/km^3$ which seems like a typo, likely $g/cm^3$), Cryosphere/Water Ice: $0.917\ g/km^3$ (typo, likely $g/cm^3$), Thermosphere: $0.000000018\ g/cm^3$, Upper Asthenosphere: $3.3\ g/cm^3$, Oceanic (Salt Water) Hydrosphere: $1.026\ g/cm^3$, Troposphere: $0.001225\ g/cm^3$, Outer Core: $11\ g/cm^3$, Continental Lithosphere: $2.7\ g/cm^3$, Exosphere: $0.000000000001\ g/cm^3$, Lower Asthenosphere: $3.4\ g/cm^3$, Oceanic Lithosphere: $3\ g/cm^3$, Mesosphere: $4.5\ g/cm^3$. Correcting the Inner Core and Cryosphere units to $g/cm^3$ (assuming typos), Inner Core's density ($12.4\ g/cm^3$) is higher than Outer Core ($11\ g/cm^3$) and others.

Step2: Compare values

After correcting typos (assuming $g/km^3$ are $g/cm^3$ errors), Inner Core has $12.4\ g/cm^3$, Outer Core $11\ g/cm^3$, Mesosphere $4.5\ g/cm^3$, etc. So Inner Core has the highest density.

Answer:

Inner Core (with a corrected density of $12.4\ g/cm^3$ assuming unit typo) has the highest average density among the listed layers.

If the question was different (like identifying atmospheric layers, or hydrosphere layers), the approach would change. Please clarify the exact question for a more accurate solution.