
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 flown on an airplane? Sometimes the ride … read more
The school year is beginning. It is important to respect … read more
This is Spruce Pine, North Carolina. It was damaged by … read more
© 2025 McGraw-Hill Education. All Rights Reserved.