
The Sun is a bright star. We see it during the day. We know it is important, but why? The Sun gives us light energy and heat energy. Energy from the Sun is called solar energy.
Photo Credit: wenani/Shutterstock
Martin Luther King, Jr., fought against racism. On January 16th, … read more
Engineers solve problems. They make new things. They make old … read more
When you look up, you can see objects in the … read more
© 2025 McGraw-Hill Education. All Rights Reserved.