Meet Gravity they're the force that keeps our feet on the ground! They're here to take readers on a journey on Earth and in space to learn about the ways that gravity shapes our reality. Readers will learn about how strength and mass impact gravity, the difference between mass and weight, and gravity's role in friction and inertia. Students will also explore gravity's impact on the sun, moon, solar system, and even black holes. For more information about the science that shapes our reality, check out other titles in the Building Blocks of Physical Science series!