Page 304 - DK Children's Encyclopedia

pollution 60, 72, 198 Ring of Fire 84 hearing 127 soldiers 20, 142, 278–279
polygons 222 rings, planetary 216, 264 sight 226 solidifying 57
pop music 176 rivers 55, 93, 121, 143, 211, 270 smell 232 solids 57, 234
population 275 robots 71, 97, 150, 181, 212, 237 senses continued solubility 148, 157
pores 229 rock cycle 213 taste 249 songbirds 39
pottery 18, 75, 262 rock music 176 touch 256 sound 127, 235
power stations 110 Rocket (steam train) 136–137, separation, mixtures 168 sound waves 235
prairies 124 260 servers 138 South America 236
praying mantises 139 rockets 237 sewing machines 150 South Pole 24, 180
precious metals 199 rocks 214, 234 shadows 147 space
prehistoric life 202 erosion 93 shapes 222 asteroids 30
prehumans 82 metals 162 flat and solid 288 astronauts 31
presidents 290 space 164 symmetry 248 astronomy 32
primary colors 27 roller coasters 88 volume 269 black holes 40
primary consumers 107 Rome, ancient 20, 28, 62, 144, sharks 223 comets 68
primates 170 230, 272 Shinkansen trains 260 constellations 73
prime ministers 289–290 Röntgen, Wilhelm Conrad 219 ships 224 eating in 105
printing 28, 44 room temperature 252 early 258 exploration 180, 181
prisms 147 roots 115, 174, 191, 194 explorers 96 galaxies 116
processors 71 rotational symmetry 248 floating 227 meteorites 164
producers 107 royal courts 62–63 paddle steamers 184 Milky Way 167
programming, computer 65, 66 Russia 275 pirate 193 pets in 153
prominences 247 slave trade 230 robots 212
protein 105, 106 Ss Viking 267 stars 242
protons 34, 58 Sahara Desert 12, 78 World War II 277 travel 237
Proxima Centauri 242 sailing boats 224 shoguns 131 universe 263
pulleys 150 salamanders 15 shops 274 see also planets
pulling 108 saliva 225 sickness 160, 225 spacecraft 181, 201, 237
pupils 226 Samurai 131 sifting 168 Apollo missions 171
puppets 253 San Andreas Fault 85 sight 226 Cassini-Huygens 216
pushing 108 sandstone 213 sign language 144 International Space Station 31
pyramids 12, 17, 35, 158 saris 63 signal flags 102 lunar rovers 259
satellites 138, 182, 215, 251 Sikhism 208 Mars rovers 156
Qq Saturn 216, 233, 289 silver 199 satellites 215
questions and answers 189 sauropods 80 singing 176 space probes 161, 237
savannas 124 sinkholes 55 space shuttles 237
Rr scales 101, 159 sinking 227 Voyager 2 264
rabbits 153 schools 272–273 skeleton 130, 228, 266 spacesuits 31
racket sports 240 science 217, 218–219 skiing 114 spaghettification 40
radio 203 ancient Greece 269 skin 119, 130, 225, 229, 256 Spanish language 144
radio waves 203, 250 ancient India 19 skydiving 33 sperm 146
railroads see trains biology 38 skyscrapers 48 spice trade 96, 180, 257
rain 211, 221, 246, 270, 271 chemistry 58 slate 213 spiders 139, 153, 238
rainbows 26 physics 192 slavery 230 spiral galaxies 116, 167
rain forest 126, 204, 236 Renaissance 209, 218 sleep 129, 231 spores 174
RAM 71 science fiction 100 smartphones 138, 250 sports 36, 121, 239, 240–241
reactions, chemical 58 scientists 217, 274, 285 smell 232, 249 spring 221
recycling 72, 195 scorpions 139 smokers, ocean 187 squares 222, 288
red giant stars 242 Scott, Robert 24 snails 139 squires 142
reflecting colors 27 Scratch 65 snakes 78, 124, 152, 210 stage 253
reflection 147 screws 150 soccer 239, 241 stalactites 55
reflective symmetry 248 sculpture 28 society stalagmites 55
religion 206–207, 208, 291 sea see oceans and seas Egyptian 17 starfish 139, 248
remote control 203 seahorses 101 Imperial Japanese 131 stars 37, 73, 167, 219, 242
Renaissance 209, 218 seashore 220 Incas 132 states, changing 57, 148, 234
renewable energy 89 seasons 221 Roman 20 static electricity 87
reptiles 22, 86, 210, 266 secondary colors 27 solar energy 60, 87, 89, 181, 192 Statue of Liberty 184
reservoirs 143 secondary consumers 107 solar flares 247 steam engines 89, 92, 133,
retina 226 sedimentary rocks 213, 214 solar system 32, 37, 68, 167, 136–137, 260
rice 16, 29 seeds 103, 115 233, 247, 263 stems 115, 174, 191,
right and wrong 189 senses 225 see also planets 194, 261

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