Begin each chapter with an activity that sets a purpose for reading.
How Do Scientists Use Their Observations? 1
What Properties Could You Use to Describe Materials? 37
How Easy Is It to Compress Air and Water? 67
How Can You Study Objects That Are Not Visible? 99
How Much Data Do You Need to Identify a Pattern? 125
What Can the Shape of a Material Tell You About the Material? 157
How Is Mass Conserved in a Chemical Change? 191
How Do Shaking and Heating Affect a Carbonated Beverage? 227
Do All Carbon Compounds Have Similar Properties? 261
What Happens When an Atom Decays? 291
How Does a Ramp Affect a Rolling Marble? 327
What Starts an Object Moving? 355
What Makes Something Sink or Float? 389
How Do Ramps Help Raise Objects? 411
How Can Energy Change Form? 445
What Happens When Hot and Cold Liquids Mix? 473
How Does a Disturbance Produce Waves? 499
How Do Color Filters Work? 531
How Can You Make Glass Disappear? 569
Can You Reverse the Battery Direction in a Flashlight? 599
How Do Magnets Interact With One Another? 629
How Are Minerals and Rocks Different? 659
How Do Freezing and Thawing Affect Rocks? 703
Why Do Cold Surfaces Become Wet? 745
Why Does the Sun Seem to Move? 793
Can You Tell How Bright a Light Really Is? 831