![](https://k-5impactnewsgk-1.mheducation.com/wp-content/uploads/2021/01/IS_K-1_NEWS_JAN_2021_004P.jpg)
Earth is covered with water. Most of the water is in oceans. Ocean water is salty. Some water is in lakes and rivers. Most lakes and rivers are not salty. They have fresh water.
Photo Credit: Studio Photogram/Alamy Stock Photo
Have you ever played with a glow stick? You bend … read more
April 22 is Earth Day. Let’s look at ways we … read more
Morse code is a way to communicate. The code was … read more
©2017 McGraw-Hill Education. All Rights Reserved.