作者: Nora Roman

Few natural forces seem as much like magic as magnets. Perhaps that’s why magnets are so fun! Young scientists will love learning about amazing magnets, both natural and man-made. They’ll discover ho …

Rulers seem like such simple tools, but their importance can’t be overstated. Without rulers so many inventions and other human-made achievements would fall apart. Readers will review the basics and …

We use scales more than we might notice in our daily lives. We weigh our food at stores, weigh our packages at the post office, and even weigh ourselves. Scientists use scales for important experimen …

Few natural forces seem as much like magic as magnets. Perhaps that’s why magnets are so fun! Young scientists will love learning about amazing magnets, both natural and man-made. They’ll discover ho …

Rulers seem like such simple tools, but their importance can”t be overstated. Without rulers so many inventions and other human-made achievements would fall apart. Readers will review the basics and …

We use scales more than we might notice in our daily lives. We weigh our food at stores, weigh our packages at the post office, and even weigh ourselves. Scientists use scales for important experimen …