True or False: The total amount of water on Earth is constantly changing.

According to the thermodynamics, the total amount of  a substance in a closed system is constant. The total amount of water is changing is a false statement.

The earth, relative to the space (Universe) is a closed system. According to the thermodynamics, the total amount of  a substance in a closed system is constant.

In the earth, water is always changing from one state to another such as polar ice melt to liquid water and liquid water evaporate to form clouds, this is known as water cycle.

Therefore, the total amount of water is changing is a false statement.

To know more about water cycle,

link?

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

where is the rest of the question. this isn't making sense. can you upload a picture of the question?