![Image of a thermokarst lake surrounded by spruce trees and soft, spongy ground. The lake water is blue and reflects the sky, which is nearly cloudless.](https://www.nasa.gov/wp-content/uploads/2022/11/img-9868.jpeg?w=1024)
Audience
Students
Grade Levels
Grades 5-8
Type
Read About It
Have you heard about climate change on the news and wondered what it is? NASA scientists have been studying Earth’s climate for more than 40 years. From those years of study, NASA has answered some questions you may have. Read the answers online, or download the printable info sheet.