Removing the odor of fish oil from any surface is a tricky undertaking. If possible, put the item into the dishwasher or washing machine. If not, try soaking the surface in apple cider vinegar for several hours.
You can put baking soda or carpet freshener on the spot where it spilled. You can also get a Febreze type cleaner or lemon oil if it is wood to help cover and take out the smell.
It's full of holes, which gives it a big surface area. Adsorption takes place on the surface.
Remove excess liquid
It contains a biosphere.
Ours - Earth.
Remove enough heat from the liquid, it changes to a solid- known as freezing.
If you have a large container and the opening has a large cross section and the container is kept still, the liquid inside will become flat. It will be level. The liquid will remain level. If some liquid is added or removed the surface will soon become level again. That would not happen with a solid.
Coarse large grained crystals.
it's widely believed that Mars once had liquid water on its surface. The polar regions have been confirmed as ice, and there are 'tracks' on the surface of Mars. These tracks appear to indicate that something (ie large boulders) has moved across the surface, leaving a 'trail' behind them.
Wave refers to the term"One of a series of ridges that moves across the surface of a liquid (especially across a large body of water) ".
Of these four choices, out current understanding of Europa (and remember, everything is subject to change in the light of more recent discoveries) indicates that Europa may have large liquid oceans under a layer of ice. There are interesting surface features that appear to be large ridges; these might have been formed by cracks in the icy surface, and liquid or vapor escaping to the surface - and then freezing into ridges as the cracks close.
To occupy a large surface.
A gas giant is a large planet that is made up mostly of gaseous and liquid substances , with little or no solid surface.