The lower density of ice compared to liquid water does not only mean that ice cubes float in your water cup. This property of water is important for life on Earth because both
all the water on Earth's surface, is an essential part of the Earth system. It interacts with
liquid water and ice are part of Earth's hydrosphere. The hydrosphere, which contains
the atmosphere and biosphere in many ways. For example, large pieces of floating ice
provide penguins, polar bears, and walruses with a resting place as they look for food in
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Water on Eart
the ocean.
3. Think about what happens in the hydrosphere and biosphere when ice forms at the
top of a lake. What might happen instead if ice were denser than liquid water?

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

2b2t

explanation:

2b2t

hurricanes form when warm, moist air from the ocean surface quickly rises into the atmosphere and forms storm clouds and rain. when the clouds are formed, heat is released which warms the cool air in the upper regions of the atmosphere so that the cycle can continue. which two phases of the water cycle are repeated in this process?