There are many interactions among living things and their surroundings. By completing a reading, scholars learn about the Earth, the moon, and the sun and how they relate to the solar system. They also investigate the basics of physical...

The cycle of energy is important to many different systems on Earth. Scholars use questioning and observation to investigate the differences between renewable and non-renewable resources and how they relate to global changes. They...

Atoms are very, very small. Atoms are so small that it is often said that there are as many atoms in a single grain of sand as there are grains of sand on all of the world's beaches - certainly a difficult thing to prove, but you get the...