TY - BOOK AU - Midthun,Joseph AU - Hiti,Samuel TI - Gravity T2 - Building blocks of physical science SN - 9780716644644 U1 - 500.2 PY - 2022///] CY - Chicago, Illinois PB - World Book KW - Physical sciences KW - Comic books, strips, etc KW - Juvenile literature KW - Gravity N1 - "Includes online access to activities."--Cover; Includes index; What is a gravity?; Measuring gravity; Mass vs/ weight; How objects fall; Friction; Inertia; Gravity and the sun; Gravity and the moon; Gravity and the solar system; Black holes; Why study gravity; Timeline; Who's who : Isaac Newton; Activity : bottle drop; Can you believe it?; Words to know ER -