Does food coloring affect the melting of ice?
Darker ice (colored) will absorb more radiant energy and melt faster in direct sunlight.
Many people make dry ice of different colors for parties, especially at Halloween. This is simple and can be done by drizzling food coloring over chunks of dry ice. Rubber gloves should be worn and the food coloring shouldn't be added until needed because it will cause the dry ice to evaporate faster.
If you mean black ground pepper, that you get from a pepper shaker, yes, it would affect the melting rate of ice - not because of its flavor (the hot taste is not the same as a hot temperature) but because it is dark colored, and therefore absorbs light more easily than ice does, and will therefore warm up faster.
The shape should not affect the Rate of Melting. It WILL change how long it takes Overall, but if you have a regular 'Ice Tray in the Freezer' Ice cube made for drinks and such and a large ice ball, as long as they are the same temperature to begin with, they will melt at the same pace. The larger one will just take longer because of its size.
Some penguins, like Emperor Penguins, breed and raise their young entirely on sea ice. When sea ice melts earlier at the end of winter this disrupts the breeding season. Another problem is that the penguins' food source, krill and other tiny crustaceans, survives on phytoplankton and zooplankton that grow on the ice. As the ice disappears, so does the plankton, disrupting the food chain.
Why are scientists not worried about melting icebergs but rather the melting of ice sheets sitting on the continent of Antarctica?
In actuality scientists worry about both the melting of icebergs and the melting of ice sheets. However, the melting of icebergs (since they already sit in the ocean) will not greatly affect sea level, but the melting of ice sheets which sit on land will increase sea level. Scientists worry that not only will the melting of the ice sheets increase sea level, but environmental habitats will be altered and/or repositioned too rapidly for organisms…