
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
This is Emmett Chappelle. He was a famous scientist. He … read more
October 4 is World Animal Day. All of us can … read more
Have you seen one of these? Do you call it … read more
© 2026 McGraw-Hill Education. All Rights Reserved.