LIFE ON THE SEASHORE 303 



pointed ; (24) when they have teeth fitted for grinding ; (25) when 

 they feed on the young of other species. 



VI. Birds: (26) like the English sparrow do much good by 

 eating seeds ; (27) like the woodpecker, do much harm by making 

 holes in trees, thus causing them to die ; (28) protect our forests 

 by eating harmful caterpillars ; (29) are adapted to their life by 

 having a large heart, light hollow bones, feathers, and front legs 

 modified to form wings ; (30) which are native to the home grounds 

 are pigeons, plover, and crows. 



VII. In a stream or pond: (31) we may observe zones of life, 

 each having its own plants and animals; (32) the fish lay their 

 eggs in the mud ; (33) insect larvae live on the bottom ; (34) turtles 

 have to come out to breathe ; (35) frogs lay their eggs in masses 

 of jelly. 



VIII. In the mountains: (36) we would always expect to find 

 the largest trees at the bases ; (37) of the southwest the big trees 

 are found at over 6000 feet elevation ; (38) the change in kind of 

 vegetation is largely due to differences in temperature ; (39) you 

 would expect to find buffalo and reindeer ; (40) many native insect- 

 killing birds make their home. 



IX. You would never expect to find : (41) sea anemones in 

 salt water ; (42) living starfish in the upper beach zone ; (43) worms 

 on the rocks 'along the seacoast ; (44) crustaceans in the sand of 

 the beaches ; (45) sea urchins on the rocks. 



X. A lynx is : (46) a crustacean ; (47) a vertebrate ; (48) a 

 mammal ; (49) a cat ; (50) none of these. 



THOUGHT QUESTIONS 



1. How many ways can you find by which a fish is fitted for 

 its life? 



2. Why is it that sometimes the school aquarium does not keep 

 its "balance" of life? 



3. How would you prove that without birds we could not have 

 gardens? 



4. How could you tell the difference between an herbivorous 

 and a carnivorous animal ? 



REPORTS UPON OUTSIDE THINGS I HAVE READ, 

 DONE, OR SEEN 



1. Report upon an article related to some topic discussed in 

 this unit. The article may be from a current number of a science 

 magazine or from some popular science book you have read. 



