How are the input and output of a system related to the law of conservation of matter? show with two forms of water and one process of conversion how the water cycle illustrates this law.

Atown is built on the banks of a small lake on the edge of a desert. after some time, the townspeople discover that water from the lake has become too polluted to use. describe one way that the lake may have been contaminated by the actions of the townspeople, and explain how the townspeople can remediate this problem.

What is the name of the ocean current that affects the british isles? how does it influence their climate?

What is a small water source like a stream or brook?