Active Science-4:@0.144982:0.974382:0.281457:0.974382:0.281457:0.957785:0.144982:0.957785:0.013067:0.008070:0.007082:0.005752:0.009742:0.009077:0.005087:0.011413:0.008070:0.005752:0.009077:0.011072:0.008070:0.009077:0.006075:0.009993
•:@0.086601:0.061081:0.099474:0.061081:0.099474:0.041466:0.086601:0.041466:0.012873
  The roots of plants break rocks into smaller pieces. These rock pieces are further :@0.099579:0.061081:0.947109:0.061081:0.947109:0.041466:0.099579:0.041466:0.005905:0.005629:0.014275:0.013085:0.010727:0.008348:0.009538:0.010727:0.010727:0.008369:0.009941:0.008348:0.010727:0.007180:0.008348:0.012299:0.006797:0.011917:0.013085:0.008369:0.009941:0.008348:0.011917:0.009538:0.010727:0.011917:0.012703:0.008348:0.009538:0.010727:0.009538:0.012703:0.009941:0.008348:0.006797:0.013085:0.008369:0.010727:0.008348:0.009941:0.018990:0.011917:0.006797:0.006797:0.010727:0.009538:0.008348:0.012299:0.006797:0.010727:0.009538:0.010727:0.009941:0.006011:0.008348:0.014275:0.013085:0.010727:0.009941:0.010727:0.008348:0.009538:0.010727:0.009538:0.012703:0.008348:0.012299:0.006797:0.010727:0.009538:0.010727:0.009941:0.008348:0.011917:0.009538:0.010727:0.008348:0.007180:0.013085:0.009538:0.008369:0.013085:0.010727:0.009433:0.005905
broken down into smaller particles and are called sand.:@0.111111:0.085071:0.660956:0.085071:0.660956:0.065456:0.111111:0.065456:0.011917:0.009538:0.010727:0.012703:0.010727:0.013085:0.006011:0.012299:0.010727:0.016632:0.013085:0.006011:0.006797:0.013085:0.008369:0.010727:0.006011:0.009941:0.018990:0.011917:0.006797:0.006797:0.010727:0.009538:0.006011:0.012299:0.011917:0.009538:0.008369:0.006797:0.009538:0.006797:0.010727:0.009941:0.006011:0.011917:0.013085:0.012299:0.006011:0.011917:0.009538:0.010727:0.006011:0.009538:0.011917:0.006797:0.006797:0.010727:0.012299:0.006011:0.009941:0.011917:0.013085:0.012299:0.005905
•:@0.086601:0.111333:0.099474:0.111333:0.099474:0.091718:0.086601:0.091718:0.012873
  Soil is the topmost layer of the earth’s surface. It is made of sand, silt and clay :@0.099579:0.111333:0.947064:0.111333:0.947064:0.091718:0.099579:0.091718:0.005905:0.005629:0.013489:0.010727:0.006797:0.006797:0.009346:0.006797:0.009941:0.009346:0.008369:0.013085:0.010727:0.009346:0.008369:0.010727:0.012299:0.018990:0.010727:0.009941:0.008369:0.009346:0.006797:0.011917:0.011513:0.010727:0.009538:0.009346:0.010727:0.007180:0.009346:0.008369:0.013085:0.010727:0.009346:0.010727:0.011917:0.009538:0.008369:0.013085:0.004440:0.009941:0.009346:0.009941:0.013085:0.009538:0.007180:0.011917:0.009538:0.010727:0.006011:0.009346:0.008752:0.008369:0.009346:0.006797:0.009941:0.009346:0.018990:0.011917:0.012299:0.010727:0.009346:0.010727:0.007180:0.009346:0.009941:0.011917:0.013085:0.012299:0.006011:0.009346:0.009941:0.006797:0.006797:0.008369:0.009346:0.011917:0.013085:0.012299:0.009346:0.009538:0.006797:0.011917:0.011407:0.005905
besides organic humus.:@0.111111:0.135323:0.342690:0.135323:0.342690:0.115708:0.111111:0.115708:0.011917:0.010727:0.009941:0.006797:0.012299:0.010727:0.009941:0.006011:0.010727:0.009538:0.011513:0.011917:0.013085:0.006797:0.009538:0.006011:0.013085:0.013085:0.018990:0.013085:0.009941:0.005905
•:@0.086601:0.161586:0.099474:0.161586:0.099474:0.141971:0.086601:0.141971:0.012873
  Sand, silt and clay are small particles of rock which are formed by weathering.:@0.099579:0.161586:0.890497:0.161586:0.890497:0.141971:0.099579:0.141971:0.005905:0.005629:0.013489:0.011917:0.013085:0.012299:0.006011:0.006011:0.009941:0.006797:0.006797:0.008369:0.006011:0.011917:0.013085:0.012299:0.006011:0.009538:0.006797:0.011917:0.011513:0.006011:0.011917:0.009538:0.010727:0.006011:0.009941:0.018990:0.011917:0.006797:0.006797:0.006011:0.012299:0.011917:0.009538:0.008369:0.006797:0.009538:0.006797:0.010727:0.009941:0.006011:0.010727:0.007180:0.006011:0.009538:0.010727:0.009538:0.012703:0.006011:0.016632:0.013085:0.006797:0.009538:0.013085:0.006011:0.011917:0.009538:0.010727:0.006011:0.007180:0.010727:0.009538:0.018990:0.010727:0.012299:0.006011:0.011917:0.011513:0.006011:0.016632:0.010727:0.011917:0.008369:0.013085:0.010727:0.009538:0.006797:0.013085:0.011513:0.005905
•:@0.086601:0.187848:0.099474:0.187848:0.099474:0.168234:0.086601:0.168234:0.012873
  There are many living things in the soil like earthworms and micro-organisms, which :@0.099579:0.187848:0.947024:0.187848:0.947024:0.168234:0.099579:0.168234:0.005905:0.005629:0.014275:0.013085:0.010727:0.009538:0.010727:0.004525:0.011917:0.009538:0.010727:0.004525:0.018990:0.011917:0.013085:0.011513:0.004525:0.006797:0.006797:0.011513:0.006797:0.013085:0.011513:0.004525:0.008369:0.013085:0.006797:0.013085:0.011513:0.009941:0.004525:0.006797:0.013085:0.004525:0.008369:0.013085:0.010727:0.004525:0.009941:0.010727:0.006797:0.006797:0.004525:0.006797:0.006797:0.012703:0.010727:0.004525:0.010727:0.011917:0.009538:0.008369:0.013085:0.016632:0.010727:0.009538:0.018990:0.009941:0.004525:0.011917:0.013085:0.012299:0.004525:0.018990:0.006797:0.009538:0.009538:0.010727:0.007180:0.010727:0.009538:0.011513:0.011917:0.013085:0.006797:0.009941:0.018990:0.009941:0.006011:0.004525:0.016632:0.013085:0.006797:0.009538:0.012981:0.005905
help in the development of humus.:@0.111111:0.211838:0.454400:0.211838:0.454400:0.192223:0.111111:0.192223:0.013085:0.010727:0.006797:0.012299:0.006011:0.006797:0.013085:0.006011:0.008369:0.013085:0.010727:0.006011:0.012299:0.010727:0.011513:0.010727:0.006797:0.010727:0.012299:0.018990:0.010727:0.013085:0.008369:0.006011:0.010727:0.007180:0.006011:0.013085:0.013085:0.018990:0.013085:0.009941:0.005905
•:@0.086601:0.238101:0.099474:0.238101:0.099474:0.218486:0.086601:0.218486:0.012873
  Soil is classified into three types based on its size, feel and colour of particles. These :@0.099579:0.238101:0.947192:0.238101:0.947192:0.218486:0.099579:0.218486:0.005905:0.005629:0.013489:0.010727:0.006797:0.006797:0.005884:0.006797:0.009941:0.005884:0.009538:0.006797:0.011917:0.009941:0.009941:0.006797:0.007180:0.006797:0.010727:0.012299:0.005884:0.006797:0.013085:0.008369:0.010727:0.005884:0.008369:0.013085:0.009538:0.010727:0.010727:0.005884:0.008369:0.011513:0.012299:0.010727:0.009941:0.005884:0.011917:0.011917:0.009941:0.010727:0.012299:0.005884:0.010727:0.013085:0.005884:0.006797:0.008369:0.009941:0.005884:0.009941:0.006797:0.010324:0.010727:0.006011:0.005884:0.007180:0.010727:0.010727:0.006797:0.005884:0.011917:0.013085:0.012299:0.005884:0.009538:0.010727:0.006797:0.010727:0.013085:0.009538:0.005884:0.010727:0.007180:0.005884:0.012299:0.011917:0.009538:0.008369:0.006797:0.009538:0.006797:0.010727:0.009941:0.006011:0.005884:0.014275:0.013085:0.010727:0.009941:0.010621:0.005905
are sandy soil, clayey soil and loamy soil.:@0.111111:0.262091:0.518083:0.262091:0.518083:0.242476:0.111111:0.242476:0.011917:0.009538:0.010727:0.006011:0.009941:0.011917:0.013085:0.012299:0.011513:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.006011:0.009538:0.006797:0.011917:0.011513:0.010727:0.011513:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.011917:0.013085:0.012299:0.006011:0.006797:0.010727:0.011917:0.018990:0.011513:0.006011:0.009941:0.010727:0.006797:0.006797:0.005905
•:@0.086601:0.288354:0.099474:0.288354:0.099474:0.268739:0.086601:0.268739:0.012873
  The removal of the topsoil by various natural forces and human activities is called :@0.099579:0.288354:0.947190:0.288354:0.947190:0.268739:0.099579:0.268739:0.005905:0.005629:0.014275:0.013085:0.010727:0.007222:0.009538:0.010727:0.018990:0.010727:0.011513:0.011917:0.006797:0.007222:0.010727:0.007180:0.007222:0.008369:0.013085:0.010727:0.007222:0.008369:0.010727:0.012299:0.009941:0.010727:0.006797:0.006797:0.007222:0.011917:0.011513:0.007222:0.011513:0.011917:0.009538:0.006797:0.010727:0.013085:0.009941:0.007222:0.013085:0.011917:0.008369:0.013085:0.009538:0.011917:0.006797:0.007222:0.007180:0.010727:0.009538:0.009538:0.010727:0.009941:0.007222:0.011917:0.013085:0.012299:0.007222:0.013085:0.013085:0.018990:0.011917:0.013085:0.007222:0.011917:0.009538:0.008369:0.006797:0.011513:0.006797:0.008369:0.006797:0.010727:0.009941:0.007222:0.006797:0.009941:0.007222:0.009538:0.011917:0.006797:0.006797:0.010727:0.012191:0.005905
soil erosion.:@0.111111:0.312343:0.228833:0.312343:0.228833:0.292729:0.111111:0.292729:0.009941:0.010727:0.006797:0.006797:0.006011:0.010727:0.009538:0.010727:0.009941:0.006797:0.010727:0.013085:0.005905
•:@0.086601:0.338606:0.099474:0.338606:0.099474:0.318991:0.086601:0.318991:0.012873
  Crop rotation is the practice of cultivating different types of crops on the same :@0.099579:0.338606:0.947149:0.338606:0.947149:0.318991:0.099579:0.318991:0.005905:0.005629:0.015443:0.009538:0.010727:0.012299:0.010239:0.009538:0.010727:0.008369:0.011917:0.008369:0.006797:0.010727:0.013085:0.010239:0.006797:0.009941:0.010239:0.008369:0.013085:0.010727:0.010239:0.012299:0.009538:0.011917:0.009538:0.008369:0.006797:0.009538:0.010727:0.010239:0.010727:0.007180:0.010239:0.009538:0.013085:0.006797:0.008369:0.006797:0.011513:0.011917:0.008369:0.006797:0.013085:0.011513:0.010239:0.012299:0.006797:0.007180:0.007180:0.010727:0.009538:0.010727:0.013085:0.008369:0.010239:0.008369:0.011513:0.012299:0.010727:0.009941:0.010239:0.010727:0.007180:0.010239:0.009538:0.009538:0.010727:0.012299:0.009941:0.010239:0.010727:0.013085:0.010239:0.008369:0.013085:0.010727:0.010239:0.009941:0.011917:0.018990:0.010621:0.005905
farmland in successive seasons. This process makes the soil fertile.:@0.111111:0.362596:0.774430:0.362596:0.774430:0.342981:0.111111:0.342981:0.007180:0.011917:0.009538:0.018990:0.006797:0.011917:0.013085:0.012299:0.006011:0.006797:0.013085:0.006011:0.009941:0.013085:0.009538:0.009538:0.010727:0.009941:0.009941:0.006797:0.011513:0.010727:0.006011:0.009941:0.010727:0.011917:0.009941:0.010727:0.013085:0.009941:0.006011:0.006011:0.014275:0.013085:0.006797:0.009941:0.006011:0.012299:0.009538:0.010727:0.009538:0.010727:0.009941:0.009941:0.006011:0.018990:0.011917:0.012703:0.010727:0.009941:0.006011:0.008369:0.013085:0.010727:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.007180:0.010727:0.009538:0.008369:0.006797:0.006797:0.010727:0.005905
Glossary :@0.073529:0.422522:0.185201:0.422522:0.185201:0.400167:0.073529:0.400167:0.018719:0.007556:0.016105:0.011634:0.011634:0.014196:0.010536:0.014077:0.007216
 :@0.073529:0.447242:0.079435:0.447242:0.079435:0.427628:0.073529:0.427628:0.005905
•:@0.111205:0.447242:0.124078:0.447242:0.124078:0.427628:0.111205:0.427628:0.012873
 :@0.124183:0.447242:0.130088:0.447242:0.130088:0.427628:0.124183:0.427628:0.005905
Topsoil :@0.133987:0.449130:0.222247:0.449130:0.222247:0.427496:0.133987:0.427496:0.015443:0.013085:0.014275:0.010727:0.013085:0.007966:0.007583:0.006096
:   The uppermost layer of the soil.:@0.339869:0.447242:0.677619:0.447242:0.677619:0.427628:0.339869:0.427628:0.006011:0.006011:0.005905:0.004949:0.014275:0.013085:0.010727:0.006011:0.013085:0.012299:0.012299:0.010727:0.009542:0.018990:0.010727:0.009941:0.008369:0.006011:0.006797:0.011917:0.011513:0.010727:0.009538:0.006011:0.010727:0.007180:0.006011:0.008369:0.013085:0.010727:0.006011:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.073529:0.474433:0.079626:0.474433:0.079626:0.452799:0.073529:0.452799:0.006096
•:@0.111205:0.472545:0.124078:0.472545:0.124078:0.452931:0.111205:0.452931:0.012873
 :@0.124183:0.472545:0.130088:0.472545:0.130088:0.452931:0.124183:0.452931:0.005905
Subsoil :@0.133987:0.474433:0.222247:0.474433:0.222247:0.452799:0.133987:0.452799:0.014275:0.014657:0.013871:0.010727:0.013085:0.007966:0.007583:0.006096
:   The middle layer of the soil.:@0.339869:0.472545:0.639549:0.472545:0.639549:0.452931:0.339869:0.452931:0.006011:0.006011:0.005905:0.004949:0.014275:0.013085:0.010727:0.006011:0.018990:0.006797:0.012299:0.012299:0.006797:0.010727:0.006011:0.006797:0.011917:0.011513:0.010727:0.009538:0.006011:0.010727:0.007180:0.006011:0.008369:0.013085:0.010727:0.006011:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.073529:0.499736:0.079626:0.499736:0.079626:0.478102:0.073529:0.478102:0.006096
•:@0.111205:0.497848:0.124078:0.497848:0.124078:0.478234:0.111205:0.478234:0.012873
 :@0.124183:0.497848:0.130088:0.497848:0.130088:0.478234:0.124183:0.478234:0.005905
Bedrock :@0.133987:0.499736:0.233696:0.499736:0.233696:0.478102:0.133987:0.478102:0.016632:0.012299:0.014275:0.011131:0.013085:0.011917:0.014275:0.006096
:   The bottom layer of the soil.:@0.339869:0.497848:0.640739:0.497848:0.640739:0.478234:0.339869:0.478234:0.006011:0.006011:0.005905:0.004949:0.014275:0.013085:0.010727:0.006011:0.011917:0.010727:0.008369:0.008369:0.010727:0.018990:0.006011:0.006797:0.011917:0.011513:0.010727:0.009538:0.006011:0.010727:0.007180:0.006011:0.008369:0.013085:0.010727:0.006011:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.073529:0.525039:0.079626:0.525039:0.079626:0.503405:0.073529:0.503405:0.006096
•:@0.111205:0.523152:0.124078:0.523152:0.124078:0.503537:0.111205:0.503537:0.012873
 :@0.124183:0.523152:0.130088:0.523152:0.130088:0.503537:0.124183:0.503537:0.005905
Crop rotation :@0.133987:0.525039:0.292727:0.525039:0.292727:0.503405:0.133987:0.503405:0.016632:0.011131:0.013085:0.014275:0.006203:0.011131:0.013085:0.009155:0.013085:0.009155:0.007966:0.013085:0.014657:0.006096
:   Growing different types of crops on the same farmland.:@0.339869:0.523152:0.909660:0.523152:0.909660:0.503537:0.339869:0.503537:0.006011:0.006011:0.005905:0.004949:0.016632:0.009538:0.010727:0.016632:0.006797:0.013085:0.011513:0.006011:0.012299:0.006797:0.007180:0.007180:0.010727:0.009538:0.010727:0.013085:0.008369:0.006011:0.008369:0.011513:0.012299:0.010727:0.009941:0.006011:0.010727:0.007180:0.006011:0.009538:0.009538:0.010727:0.012299:0.009941:0.006011:0.010727:0.013085:0.006011:0.008369:0.013085:0.010727:0.006011:0.009941:0.011917:0.018990:0.010727:0.006011:0.007180:0.011917:0.009538:0.018990:0.006797:0.011917:0.013085:0.012299:0.005905
 :@0.073529:0.550342:0.079626:0.550342:0.079626:0.528708:0.073529:0.528708:0.006096
•:@0.111205:0.548455:0.124078:0.548455:0.124078:0.528840:0.111205:0.528840:0.012873
 :@0.124183:0.548455:0.130088:0.548455:0.130088:0.528840:0.124183:0.528840:0.005905
Soil conservation :@0.133987:0.550342:0.334042:0.550342:0.334042:0.528708:0.133987:0.528708:0.014275:0.013085:0.007966:0.007583:0.006203:0.011917:0.013085:0.014657:0.010727:0.012299:0.011131:0.013085:0.013085:0.009155:0.007966:0.013085:0.014657:0.006096
:   Prevention of erosion of soil.:@0.339869:0.548455:0.643160:0.548455:0.643160:0.528840:0.339869:0.528840:0.006011:0.006011:0.005905:0.004949:0.014275:0.009538:0.010727:0.011513:0.010727:0.013085:0.008369:0.006797:0.010727:0.013085:0.006011:0.010727:0.007180:0.006011:0.010727:0.009538:0.010727:0.009941:0.006797:0.010727:0.013085:0.006011:0.010727:0.007180:0.006011:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.073529:0.575645:0.079626:0.575645:0.079626:0.554011:0.073529:0.554011:0.006096
•:@0.111205:0.573758:0.124078:0.573758:0.124078:0.554143:0.111205:0.554143:0.012873
 :@0.124183:0.573758:0.130088:0.573758:0.130088:0.554143:0.124183:0.554143:0.005905
Soil erosion :@0.133987:0.575645:0.272144:0.575645:0.272144:0.554011:0.133987:0.554011:0.014275:0.013085:0.007966:0.007583:0.006203:0.012299:0.011131:0.013085:0.010727:0.007966:0.013085:0.014657:0.006096
:   The removal of topsoil by the action of either wind or water.:@0.339869:0.573758:0.941149:0.573758:0.941149:0.554143:0.339869:0.554143:0.006011:0.006011:0.005905:0.004949:0.014275:0.013085:0.010727:0.004652:0.009538:0.010727:0.018990:0.010727:0.011519:0.011917:0.006797:0.004652:0.010727:0.007180:0.004652:0.008371:0.010727:0.012299:0.009941:0.010727:0.006797:0.006797:0.004652:0.011917:0.011513:0.004652:0.008369:0.013085:0.010727:0.004652:0.011917:0.009538:0.008369:0.006797:0.010727:0.013085:0.004652:0.010727:0.007180:0.004652:0.010727:0.006797:0.008369:0.013085:0.010727:0.009538:0.004652:0.016632:0.006797:0.013085:0.012299:0.004652:0.010727:0.009538:0.004652:0.016632:0.011917:0.008369:0.010727:0.009538:0.005905
Practice Time:@0.073529:0.646291:0.245992:0.646291:0.245992:0.624293:0.073529:0.624293:0.016183:0.012784:0.014735:0.013935:0.012207:0.007430:0.013935:0.014510:0.005882:0.016444:0.008105:0.021882:0.014431
 :@0.073529:0.679433:0.079626:0.679433:0.079626:0.657799:0.073529:0.657799:0.006096
A. Tick the correct option.:@0.102949:0.679433:0.395449:0.679433:0.395449:0.657799:0.102949:0.657799:0.016229:0.006011:0.007180:0.015443:0.007966:0.011917:0.014275:0.006203:0.009155:0.014657:0.012299:0.006203:0.011917:0.013085:0.011131:0.011131:0.012299:0.011917:0.009155:0.006203:0.013085:0.014275:0.009155:0.007966:0.013085:0.014657:0.005905
1.:@0.106263:0.703606:0.124085:0.703606:0.124085:0.683991:0.106263:0.683991:0.011917:0.005905
The process of natural breakdown of rocks is called _____________.:@0.133987:0.703606:0.791570:0.703606:0.791570:0.683991:0.133987:0.683991:0.014275:0.013085:0.010727:0.006011:0.012299:0.009538:0.010727:0.009538:0.010727:0.009941:0.009941:0.006011:0.010727:0.007180:0.006011:0.013085:0.011917:0.008369:0.013085:0.009538:0.011917:0.006797:0.006011:0.011917:0.009538:0.010727:0.011917:0.012703:0.012299:0.010727:0.016632:0.013085:0.006011:0.010727:0.007180:0.006011:0.009538:0.010727:0.009538:0.012703:0.009941:0.006011:0.006797:0.009941:0.006011:0.009538:0.011917:0.006797:0.006797:0.010727:0.012299:0.006011:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.005905
 :@0.073529:0.729667:0.079435:0.729667:0.079435:0.710052:0.073529:0.710052:0.005905
  a. weathering :@0.124183:0.729667:0.276219:0.729667:0.276219:0.710052:0.124183:0.710052:0.005905:0.003896:0.011917:0.006011:0.006011:0.016632:0.010727:0.011917:0.008369:0.013085:0.010727:0.009538:0.006797:0.013085:0.011513:0.005905
 :@0.367637:0.729667:0.373543:0.729667:0.373543:0.710052:0.367637:0.710052:0.005905
b. soil erosion:@0.571884:0.729667:0.707534:0.729667:0.707534:0.710052:0.571884:0.710052:0.011917:0.006011:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.010727:0.009538:0.010727:0.009941:0.006797:0.010727:0.012979
 :@0.073529:0.755727:0.079435:0.755727:0.079435:0.736112:0.073529:0.736112:0.005905
  c. crop rotation :@0.124183:0.755727:0.289092:0.755727:0.289092:0.736112:0.124183:0.736112:0.005905:0.003896:0.009538:0.006011:0.006011:0.009538:0.009538:0.010727:0.012299:0.006011:0.009538:0.010727:0.008369:0.011917:0.008369:0.006797:0.010727:0.013085:0.005905
 :@0.367635:0.755727:0.373541:0.755727:0.373541:0.736112:0.367635:0.736112:0.005905
d. soil conservation:@0.571884:0.755727:0.762338:0.755727:0.762338:0.736112:0.571884:0.736112:0.012299:0.006011:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.009538:0.010727:0.013085:0.009941:0.010727:0.009538:0.011513:0.011917:0.008369:0.006797:0.010727:0.012979
 :@0.073529:0.781788:0.079435:0.781788:0.079435:0.762173:0.073529:0.762173:0.005905
2.  The uppermost layer of soil is called _____________.:@0.106263:0.781788:0.642980:0.781788:0.642980:0.762173:0.106263:0.762173:0.011917:0.006011:0.005905:0.003908:0.014275:0.013085:0.010727:0.006011:0.013085:0.012299:0.012299:0.010727:0.009538:0.018990:0.010727:0.009941:0.008369:0.006011:0.006797:0.011917:0.011513:0.010727:0.009538:0.006011:0.010727:0.007180:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.006797:0.009941:0.006011:0.009538:0.011917:0.006797:0.006797:0.010727:0.012299:0.006011:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.005905
 :@0.073529:0.807848:0.079435:0.807848:0.079435:0.788234:0.073529:0.788234:0.005905
  a. topsoil :@0.124183:0.807848:0.229487:0.807848:0.229487:0.788234:0.124183:0.788234:0.005905:0.003896:0.011917:0.006011:0.006011:0.008369:0.010727:0.012299:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.367644:0.807848:0.373549:0.807848:0.373549:0.788234:0.367644:0.788234:0.005905
b. bedrock :@0.571884:0.807848:0.679176:0.807848:0.679176:0.788234:0.571884:0.788234:0.011917:0.006011:0.006011:0.011917:0.010727:0.012299:0.009538:0.010727:0.009538:0.012703:0.005905
 :@0.073529:0.833909:0.079435:0.833909:0.079435:0.814294:0.073529:0.814294:0.005905
  c. subsoil :@0.124183:0.833909:0.230655:0.833909:0.230655:0.814294:0.124183:0.814294:0.005905:0.003896:0.009538:0.006011:0.006011:0.009941:0.013085:0.011917:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.367644:0.833909:0.373549:0.833909:0.373549:0.814294:0.367644:0.814294:0.005905
d. soil profile:@0.571884:0.833909:0.700440:0.833909:0.700440:0.814294:0.571884:0.814294:0.012299:0.006011:0.006011:0.009941:0.010727:0.006797:0.006797:0.006011:0.012299:0.009538:0.010727:0.007180:0.006797:0.006797:0.010621
 :@0.073529:0.859970:0.079435:0.859970:0.079435:0.840355:0.073529:0.840355:0.005905
3.  This layer contains large pieces of rocks and is very hard. It is called _____________.:@0.106263:0.859970:0.941067:0.859970:0.941067:0.840355:0.106263:0.840355:0.011917:0.006011:0.005905:0.003908:0.014275:0.013085:0.006797:0.009941:0.004333:0.006797:0.011917:0.011513:0.010727:0.009538:0.004333:0.009538:0.010727:0.013085:0.008369:0.011917:0.006797:0.013085:0.009941:0.004333:0.006797:0.011917:0.009538:0.011513:0.010727:0.004333:0.012299:0.006797:0.010727:0.009538:0.010727:0.009941:0.004333:0.010727:0.007180:0.004333:0.009538:0.010727:0.009538:0.012703:0.009941:0.004333:0.011917:0.013085:0.012299:0.004333:0.006797:0.009941:0.004333:0.011513:0.010727:0.009538:0.011513:0.004333:0.013085:0.011917:0.009538:0.012299:0.006011:0.004333:0.008752:0.008369:0.004333:0.006797:0.009941:0.004333:0.009538:0.011917:0.006797:0.006797:0.010727:0.012299:0.004333:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.010727:0.005905
 :@0.073529:0.886030:0.079435:0.886030:0.079435:0.866415:0.073529:0.866415:0.005905
  a. topsoil :@0.124183:0.886030:0.229487:0.886030:0.229487:0.866415:0.124183:0.866415:0.005905:0.003896:0.011917:0.006011:0.006011:0.008369:0.010727:0.012299:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.367644:0.886030:0.373549:0.886030:0.373549:0.866415:0.367644:0.866415:0.005905
b. subsoil :@0.571884:0.886030:0.670935:0.886030:0.670935:0.866415:0.571884:0.866415:0.011917:0.006011:0.006011:0.009941:0.013085:0.011917:0.009941:0.010727:0.006797:0.006797:0.005905
 :@0.073529:0.912091:0.079435:0.912091:0.079435:0.892476:0.073529:0.892476:0.005905
  c. bedrock :@0.124183:0.912091:0.238897:0.912091:0.238897:0.892476:0.124183:0.892476:0.005905:0.003896:0.009538:0.006011:0.006011:0.011917:0.010727:0.012299:0.009538:0.010727:0.009538:0.012703:0.005905
 :@0.367644:0.912091:0.373549:0.912091:0.373549:0.892476:0.367644:0.892476:0.005905
d. humus:@0.571884:0.912091:0.664286:0.912091:0.664286:0.892476:0.571884:0.892476:0.012299:0.006011:0.006011:0.013085:0.013085:0.018990:0.013085:0.009835
112:@0.075163:0.967768:0.105324:0.967768:0.105324:0.951170:0.075163:0.951170:0.010083:0.010083:0.009993