A WORD FORMS 15 SENTENCES 1 Scientists have made many important new of the depth by using modern devices (DISCOVER) 2 Some whales are known to into warm waters to bear their calves (MIGRATION) 3 Seventy five percent of the earth’s surface is by water (COVER) 4 The government has just set up a wildlife project (CONSERVE) 5 People are doing harm to the environment (CONSTANT) 6 He stressed the need to pass a law in natures (DEFEND) 7 Trees, grasses, and other plant life play an important part in t.