This movie requires Flash Player 8. Download Flash Player 8

Issue Features
View this issue online as it looks in print
Discovery Magazine 2/1/2013

How do we get clean water?

by  Digger Doug

Dear Jeffrey,

If you are like me, there is nothing better than an ice-cold glass of clean water after I have been running, playing, or exercising. Where does that clean water come from? About 97% of the water on the Earth is found in the oceans. People don’t normally drink that because it has sodium in it. That leaves about 3% of Earth’s water that is found in other places, such as underground (known as groundwater), frozen in polar icecaps, in the air, or in bodies of water like ponds, lakes, and rivers. The Sun sends energy into our atmosphere that heats the water and causes it to evaporate. Evaporation occurs when a liquid (like water) turns into a gas. You have probably seen a teapot whistle, using evaporated water called steam. When water evaporates, it leaves behind much of the part we do not want to drink.

After it evaporates, the water vapor goes up into the atmosphere. It then becomes cooler, changes back into water (a process called condensation), and bunches together to form clouds. When so much water collects in the atmosphere that the air can no longer hold it, the water is sent back to Earth in the form of rain, sleet, snow, or hail (called precipitation). When the precipitation comes back to the Earth, it lands in oceans, lakes, streams, or on land. When the water seeps through the ground, material such as sand filters out many of the things that contaminate water.

Many people drink water out of wells where natural substances, such as sand, filter the water. But millions of other people who live in cities drink “city water.” That just means that the water goes to a water treatment facility that has man-made filters to clean the water. We should definitely be thankful to God for the clean water we get to drink that keeps us alive.

Copyright © 2013 Apologetics Press, Inc. All rights reserved.

*Please keep in mind that Discovery articles are written for 3rd-6th graders.

This document may be copied, on the condition that it will not be republished in print unless otherwise stated below, and will not be used for any commercial purpose, as long as the following stipulations are observed: (1) Apologetics Press must be designated as the original publisher; (2) the specific Apologetics Press Web site URL must be noted; (3) any references, footnotes, or endnotes that accompany the article must be included with any written reproduction of the article; (4) textual alterations of any kind are strictly forbidden; (5) Some illustrations (e.g., photographs, charts, graphics, etc.) are not the intellectual property of Apologetics Press and as such cannot be reproduced from our site without consent from the person or organization that maintains those intellectual rights; (6) serialization of written material (e.g., running an article in several parts) is permitted, as long as the whole of the material is made available, without editing, in a reasonable length of time; (7) articles, excepting brief quotations, may not be offered for sale or included in items offered for sale; and (8) articles may be reproduced in electronic form for posting on Web sites pending they are not edited or altered from their original written content and that credit is given to Apologetics Press, including the web location from which the articles were taken. Further, documents may not be copied without source statements (title, author, journal title), and the address of the publisher and owner of rights, as listed below.

For catalog, samples, or further information, contact:

Apologetics Press
230 Landmark Drive
Montgomery, Alabama 36117
Phone (334) 272-8558

Web Store

Defending the Faith Study Bible

We are very excited to announce the NEW AP Defending the Faith Study Bible now available.

Featured Audio


Click the following link to visit our Multimedia section.

Featured Audio