©2017 McGraw-Hill Education. All Rights Reserved.
Maria Telkes was a scientist and an inventor. She studied physical chemistry. Telkes learned that heat from sunlight could be used as energy. Energy from the heat of the Sun is called solar energy. Solar … Read more
Suitcases and bags lined the sidewalk outside Agawam High School in Massachusetts. Students weren’t preparing for a trip, though. Those suitcases and bags were full of emergency supplies. They contained canned food, water, blankets, and … Read more
A long time ago, giant sea turtles swam in the oceans. Most of them lived in the waters near North America. Some types of sea turtles are extinct. They no longer exist. Scientists work to … Read more
A freight train went off the railroad tracks near the border of Pennsylvania and Ohio. The train crashed in a town called East Palestine, Ohio. Many of the train’s cars flipped over. Nobody was killed. … Read more
©2017 McGraw-Hill Education. All Rights Reserved.