![](https://k-5impactnewsgk-1.mheducation.com/wp-content/uploads/2022/09/IS_K-1_NEWS_SEP_2022_004P-1.jpg)
Mario Molina was born in Mexico. As a little boy he played with toy chemistry sets. Mario Molina became a chemist.
Photo Credit: Louis MONIER/Gamma-Rapho/Getty Images
Many places are having summer heat waves. These are periods … read more
Scientists make observations. Look at the photo of the cactus. … read more
Every year there is a special football game. It is … read more
©2017 McGraw-Hill Education. All Rights Reserved.