What If? – Mind–Boggling Science Questions for Kids

<p>Introduction 1</p>
<p>Big, Blue, Spinning Ball The Earth 3</p>
<p>What if you dug a hole through the Earth? 4</p>
<p>What if you dropped a rock down a hole through the Earth? 6</p>
<p>What if the Earth were square? 8</p>
<p>What if you lived at the North Pole? 10</p>
<p>What if the Earth had no magnetism? 12</p>
<p>What if the Earth spun very fast? 14</p>
<p>What if the Earth suddenly stopped spinning? 16</p>
<p>What if the Earth were covered by water? 18</p>
<p>It s Raining Frogs Weather and Climate 21</p>
<p>What if the Earth were hit by a big meteorite? 22</p>
<p>What if a day lasted a year? 24</p>
<p>What if there were no seasons? 26</p>
<p>What if it rained cats and dogs (or fish and frogs)? 28</p>
<p>What if people could control the weather? 30</p>
<p>What if the climate got much hotter? 32</p>
<p>What if the sky were always cloudy? 34</p>
<p>What s the Matter with Matter? Forces and Energy 36</p>
<p>What if things fell up, not down? 38</p>
<p>What if things could pass through one another? 40</p>
<p>What if water didn t evaporate? 42</p>
<p>What if drops of water were really big? 44</p>
<p>What if water could flow uphill? 46</p>
<p>Are You Seeing Things? Light and Sound 49</p>
<p>What if everything were the same color? 50</p>
<p>What if the sky were black during the daytime? 52</p>
<p>What if light didn t travel in straight lines? 54</p>
<p>What if light traveled very slowly? 56</p>
<p>What if you could see sounds? 58</p>
<p>What if you could see in the dark? 60</p>
<p>Into the Wormhole Time 63</p>
<p>What if all past time were squeezed into one year? 64</p>
<p>What if you could travel into the future? 66</p>
<p>What if you could travel into the past? 68</p>
<p>Candle Clocks and Supercomputers Inventions 71</p>
<p>What if cars didn t need fuel? 72</p>
<p>What if electric lights hadn t been invented? 74</p>
<p>What if clocks hadn t been invented? 76</p>
<p>What if computers could think like people? 78</p>
<p>Smart Pigs and Pet Dinosaurs Plants and Animals 80</p>
<p>What if the dinosaurs hadn t died out? 82</p>
<p>What if we brought the dinosaurs back? 84</p>
<p>What of all plants and animals disappeared? 86</p>
<p>The Amazing, Changing Me People and Animals 89</p>
<p>What if some animals were smarter than people? 90</p>
<p>What if you were size of an insect? 92</p>
<p>What if you were the size of a giant? 94</p>
<p>What if you had a dog s sense of smell? 96</p>
<p>What if you could fly like a bird? 98</p>
<p>What if you saw the world upside down? 100</p>
<p>What if you had three eyes? 102</p>
<p>What if you looked exactly like everyone else? 104</p>
<p>What if you always knew what other people were thinking? 106</p>
<p>The Superstar and the Big Cheese The Sun and the Moon 109</p>
<p>What if the Sun stopped shining? 110</p>
<p>What if the Sun doesn t rise tomorrow? 112</p>
<p>What if the Earth didn t go around the Sun in a circle? 114</p>
<p>What if the Earth had two suns? 116</p>
<p>What if the Moon fell down? 118</p>
<p>What if the Moon were much closer to the Earth? 120</p>
<p>What if there were no Moon? 122</p>
<p>What if you moved to the Moon? 124</p>
<p>Nonstop Flight to Neptune Visiting Other Planets 126</p>
<p>What if you visited Mercury? 128</p>
<p>What if you visited Venus? 130</p>
<p>What if you visited Mars? 132</p>
<p>What if you visited Jupiter? 134</p>
<p>What if you visited Saturn? 136</p>
<p>What if you visited Uranus or Neptune? 138</p>
<p>What if you visited Pluto? 140</p>
<p>What if you visited planets in another solar system? 142</p>
<p>Beam Me Up The Stars and Beyond 145</p>
<p>What if you traveled to the nearest star? 146</p>
<p>What if you traveled to the center of our galaxy? 148</p>
<p>What if you traveled to another galaxy? 150</p>
<p>What if you went to the edge of the universe? 152</p>
<p>What if there are intelligent aliens? 154</p>
<p>What if tiny aliens landed on Earth? 156</p>
<p>What if aliens lived inside the Earth? 158</p>
<p>What if aliens who looked just like us landed on Earth? 160</p>
<p>What if aliens who wanted to talk only dogs landed on Earth? 162</p>
<p>Glossary 165</p>
<p>Index 175</p>