
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
February is Black History Month! Who are some people to … read more
The Sun is a bright star. We see it during … read more
January 20 is MLK Day. On this day we celebrate … read more
© 2026 McGraw-Hill Education. All Rights Reserved.