How many percent is the water on our earth?

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

What are economic benefits of building dams

When volcanoes erupt, magma (hot, molten rock) rises toward the surface of the earth. as magma cools, solid rock forms. this rock contains substances from the interior of the earth. which of the following natural resources is likely to be plentiful near subduction zones where volcanic activity has occurred in the past?