Environmental Science

Environmental Science Worksheet-7

1. What is the process of extracting fresh water from salt water called?

(a) Desalination                            (b) Salination

(c) Purification                              (d) Contamination

2. What is an aquifer?

(a) A small pond that is filled with water.

(b) An underground layer of rock or soil that is filled with water.

(c) A fresh water lake.

(d) A salt water lake.

Environmental Science Worksheet-8

1. What chemical is used to kill bacteria in city water supply?

(a) Fluoride                                    (b) Chlorine

(c) Iodine                                        (d) Antibiotic medicine

2. What two factors drive the surface current in the ocean?

(a) Wind and Earth's temperature

(b) Wind and Earth's rotation

(c) Ice cap and Earth's rotation

(d) Volcanoes and ocean's surface