How?: The Most Awesome Question and Answer Book About Nature, Animals, People, Places — and You!
nun 2 Road Trip 111 How does the steering wheel turn the car 114 Why are there so many different traffic signs 116 Why are wheels round 118 How are roads built 120 How are bridges built 124 Why does gasoline smell so strong 126 Why are there speed limits Why does it look like there is water on the road ahead How come my sister gets carsick Who invented the first car 134 128 130 132
144 Airport Good byes 165 How do planes land so easily Who invented the airplane 170 Why are airports so busy 172 At the Beach 137 Why do you need a passport 176 How does the sand get so hot 140 How do X rays work 178 How does all the sand get to the beach 142 Where does my suitcase go 180 Why does wet sand work better for sandcastles Why do hugs make you feel so good 182 Why do beaches have seagulls 146 146 Why does the security gate beep 184 How do shells get so shiny 148 How do planes take off when they weigh so much 186 Why do I hear the sea in a shell 150 How do I float in the water 152 Why is the ocean salty Index 190 How are waves made Why does the water knock over my sandcastle 158 How many whales are in the oceans 160 Why does the Sun burn me 162 154 156
