How do they make that move? -- What is motion? -- What happens when forces clash? -- Why do moving things slow down? -- Is resistance a drag? -- Gravity : what’s it all about? -- Can you spot the forces? My World of Science Series Interest Level: K-3 Reading Level: 3.2 ATOS Book Level: 3.2 AR Interest Level: LG AR Points: .5 AR Quiz: 60925EN Guided Reading Level: M.