GLOSSARY OF KEY TERMS
Capillaries: Very small blood vessels that link arteries and veins.
Carbon cycle: Explains how carbon is cycled through the living and non-living parts of the Earth.
Carbon footprint: The amount of greenhouse gases we emit into the atmosphere as a result of our activities.
Carbon sink: Anything that takes carbon dioxide out of the atmosphere.
Carbon source: Anything that releases carbon dioxide into the atmosphere.
Cardiac muscle: Makes up the heart and can continuously pump blood.
Carnivore: Animals that only eat animals.
Catalyst: A substance that speeds up the rate of a chemical reaction and is chemically unchanged at the end of the reaction.
Celestial object: Any natural body beyond the Earth’s atmosphere.
Cell: The basic building block of life with all the characteristics of life.
Cell membrane: Surrounds the cell, controlling which materials move in and out of it.
Chambers: The four spaces within the heart – the right atrium, left atrium, right ventricle and left ventricle.
Characteristic: A feature of an organism.
Characteristics of life: The seven common features that tell us if something is living.
Chemical change: When a new substance is formed. All chemical reactions are examples of a chemical change.
Chemical formula: Shows the chemical symbols and ratio of atoms for each element in a compound.
Chemical symbol: A symbol used to indicate each element.
Chlorophyll: A green pigment in the chloroplast that absorbs light energy and uses it to power chemical reactions.
Chloroplasts: Small organelles in the cytoplasm of plant cells where photosynthesis takes place. Contain the green pigment chlorophyll.
Chromatography: The method used to separate mixtures of substances that are in a solution.
Chromosome: A thread-like structure made up of DNA and protein, found in the nucleus of a cell.
396 Elements of Science
Climate change: Changes in the Earth’s temperature and weather patterns.
Comet: A small lump of ice and dust that orbits the Sun.
Community: All the populations of plant and animal species that live together in an area.
Competition: The struggle between organisms for resources that are in short supply.
Compound: The substance made when two or more elements are chemically combined.
Computer: An electronic machine that can use and store data.
Concentrated solution: A solution that contains a large amount of solute in a small amount of solvent.
Concentration: The exact amount of one particular substance that is dissolved in another substance.
Conclusion: When the data produced during the investigation can be used to show that a hypothesis is or is not supported.
Condensation: When a gas is cooled, energy is taken from its particles. They slow down and move more closely together. The gas changes to a liquid.
Conductor: Any material that allows charge to flow through it easily.
Conservation: The careful management of the Earth’s ecosystems to protect them against harm caused by humans.
Consumers: Animals that get their food by eating plants or other animals.
Contact forces: Any forces that must be in direct contact with the object they are moving.
Contraception: The prevention of pregnancy using artificial or natural methods.
Corrosion: When a metal reacts with water and oxygen and a metal oxide forms.
Covalent bond: Formed when pairs of electrons are shared between two atoms.
Current: The flow of negatively charged electrons through a wire from the negative terminal of a battery to the positive terminal of a battery.
Cytoplasm: A jelly-like substance surrounded by the cell membrane. Contains the nucleus and dissolved substances, including oxygen.
Decomposer: An organism that feeds on dead plant and animal material.
Deforestation: The cutting down of trees.
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82 |
Page 83 |
Page 84 |
Page 85 |
Page 86 |
Page 87 |
Page 88 |
Page 89 |
Page 90 |
Page 91 |
Page 92 |
Page 93 |
Page 94 |
Page 95 |
Page 96 |
Page 97 |
Page 98 |
Page 99 |
Page 100 |
Page 101 |
Page 102 |
Page 103 |
Page 104 |
Page 105 |
Page 106 |
Page 107 |
Page 108 |
Page 109 |
Page 110 |
Page 111 |
Page 112 |
Page 113 |
Page 114 |
Page 115 |
Page 116 |
Page 117 |
Page 118 |
Page 119 |
Page 120 |
Page 121 |
Page 122 |
Page 123 |
Page 124 |
Page 125 |
Page 126 |
Page 127 |
Page 128 |
Page 129 |
Page 130 |
Page 131 |
Page 132 |
Page 133 |
Page 134 |
Page 135 |
Page 136 |
Page 137 |
Page 138 |
Page 139 |
Page 140 |
Page 141 |
Page 142 |
Page 143 |
Page 144 |
Page 145 |
Page 146 |
Page 147 |
Page 148 |
Page 149 |
Page 150 |
Page 151 |
Page 152 |
Page 153 |
Page 154 |
Page 155 |
Page 156 |
Page 157 |
Page 158 |
Page 159 |
Page 160 |
Page 161 |
Page 162 |
Page 163 |
Page 164 |
Page 165 |
Page 166 |
Page 167 |
Page 168 |
Page 169 |
Page 170 |
Page 171 |
Page 172 |
Page 173 |
Page 174 |
Page 175 |
Page 176 |
Page 177 |
Page 178 |
Page 179 |
Page 180 |
Page 181 |
Page 182 |
Page 183 |
Page 184 |
Page 185 |
Page 186 |
Page 187 |
Page 188 |
Page 189 |
Page 190 |
Page 191 |
Page 192 |
Page 193 |
Page 194 |
Page 195 |
Page 196 |
Page 197 |
Page 198 |
Page 199 |
Page 200 |
Page 201 |
Page 202 |
Page 203 |
Page 204 |
Page 205 |
Page 206 |
Page 207 |
Page 208 |
Page 209 |
Page 210 |
Page 211 |
Page 212 |
Page 213 |
Page 214 |
Page 215 |
Page 216 |
Page 217 |
Page 218 |
Page 219 |
Page 220 |
Page 221 |
Page 222 |
Page 223 |
Page 224 |
Page 225 |
Page 226 |
Page 227 |
Page 228 |
Page 229 |
Page 230 |
Page 231 |
Page 232 |
Page 233 |
Page 234 |
Page 235 |
Page 236 |
Page 237 |
Page 238 |
Page 239 |
Page 240 |
Page 241 |
Page 242 |
Page 243 |
Page 244 |
Page 245 |
Page 246 |
Page 247 |
Page 248 |
Page 249 |
Page 250 |
Page 251 |
Page 252 |
Page 253 |
Page 254 |
Page 255 |
Page 256 |
Page 257 |
Page 258 |
Page 259 |
Page 260 |
Page 261 |
Page 262 |
Page 263 |
Page 264 |
Page 265 |
Page 266 |
Page 267 |
Page 268 |
Page 269 |
Page 270 |
Page 271 |
Page 272 |
Page 273 |
Page 274 |
Page 275 |
Page 276 |
Page 277 |
Page 278 |
Page 279 |
Page 280 |
Page 281 |
Page 282 |
Page 283 |
Page 284 |
Page 285 |
Page 286 |
Page 287 |
Page 288 |
Page 289 |
Page 290 |
Page 291 |
Page 292 |
Page 293 |
Page 294 |
Page 295 |
Page 296 |
Page 297 |
Page 298 |
Page 299 |
Page 300 |
Page 301 |
Page 302 |
Page 303 |
Page 304 |
Page 305 |
Page 306 |
Page 307 |
Page 308 |
Page 309 |
Page 310 |
Page 311 |
Page 312 |
Page 313 |
Page 314 |
Page 315 |
Page 316 |
Page 317 |
Page 318 |
Page 319 |
Page 320 |
Page 321 |
Page 322 |
Page 323 |
Page 324 |
Page 325 |
Page 326 |
Page 327 |
Page 328 |
Page 329 |
Page 330 |
Page 331 |
Page 332 |
Page 333 |
Page 334 |
Page 335 |
Page 336 |
Page 337 |
Page 338 |
Page 339 |
Page 340 |
Page 341 |
Page 342 |
Page 343 |
Page 344 |
Page 345 |
Page 346 |
Page 347 |
Page 348 |
Page 349 |
Page 350 |
Page 351 |
Page 352 |
Page 353 |
Page 354 |
Page 355 |
Page 356 |
Page 357 |
Page 358 |
Page 359 |
Page 360 |
Page 361 |
Page 362 |
Page 363 |
Page 364 |
Page 365 |
Page 366 |
Page 367 |
Page 368 |
Page 369 |
Page 370 |
Page 371 |
Page 372 |
Page 373 |
Page 374 |
Page 375 |
Page 376 |
Page 377 |
Page 378 |
Page 379 |
Page 380 |
Page 381 |
Page 382 |
Page 383 |
Page 384 |
Page 385 |
Page 386 |
Page 387 |
Page 388 |
Page 389 |
Page 390 |
Page 391 |
Page 392 |
Page 393 |
Page 394 |
Page 395 |
Page 396 |
Page 397 |
Page 398 |
Page 399 |
Page 400 |
Page 401 |
Page 402 |
Page 403 |
Page 404 |
Page 405 |
Page 406 |
Page 407 |
Page 408 |
Page 409 |
Page 410 |
Page 411 |
Page 412 |
Page 413 |
Page 414 |
Page 415 |
Page 416 |
Page 417 |
Page 418 |
Page 419 |
Page 420 |
Page 421 |
Page 422 |
Page 423 |
Page 424 |
Page 425 |
Page 426
