Interactive Guide Grade 2

24 Second Grade Core Subjects : : Science (Behold and See 2)

Table of Contents

Preface, 1 Simple Machines, Work, and Energy , 2 Josh Uses Tools, 4 Tools at Work, 6 Tools and Simple Machines at Work and Play: Inclined Plane, 7 Tools and Simple Machines at Work and Play: Lever, 8

Tools and Simple Machines at Work and Play, 11 Simple Machines: Observe and Compare Levers, 12 Simple Machines: Inclined Planes, 15 Simple Machines at Work and Play: Wedge, 16 Simple Machines at Work and Play: Screw, 18 Simple Machines at Work and Play: Wheel, 19

Find the Wedges and Screws, 21 Simple Machines: Wedges, 22 Simple Machines: Wheels, 23

What is Work? 24 What is Energy? 26 Kinetic and Potential Energy, 29 Kinetic and Potential Energy Activity, 32 Simple Machines Make Energy, 33 God Provides Water for the World that He Created , 36 Which Happens First? 43 Evaporation and Condensation, 44 Natural Resources: God’s Gifts to Man , 46

Conservation and Wise Use, 48 What Are Natural Resources? 49 Natural Resources All Around, 54 Find the Natural Resources, 55

Thinking about Natural Resources, 56 Dirt! Soil Is a Natural Resource, 58 Erosion, 60 Conservation of Soil: Stopping Erosion, 61 “Dig Up” the Correct Word, 62 Soil in My Yard, 63 Erosion, 65 The Earth on Which We Live , 68 Layers of the Earth, 72