16 MATTER AND ITS MEASUREMENT 



5. Name five phenomena besides those of 2. 



6. Compare the way in which water is poured out of an inverted, 

 small-mouth bottle with the way in which it is poured out of a pitcher. 

 Explain. 



7. Find the number of cubic feet of air in a room 14 ft. by 14 ft. by 

 9 ft. high. Find the weight of the air in ounces, if one cubic foot of air 

 weighs \% ounces. Reduce the weight to pounds. 



8. Write down as grams and decimal parts of a gram 6 grams, 5 

 decigrams, 3 centigrams, and 9 milligrams. Subtract from this number 

 the sum of 2 grams and 8 centigrams. 



9. Locate the North Star to-night or the next clear night, note the 

 hour, and draw a diagram to show the position of the "Big Dipper" 

 with reference to the star. What stars of the dipper are the ' ' Pointers' ' ? 



10. Look up (in the Glossary at the back of this book) the difference 

 between planets and fixed stars. Name some of the planets. Name 

 some fixed stars besides Polaris. 



11. Look up the distance of the moon from the earth. What is the 

 moon's diameter? The earth's? 



12. Look in a dictionary for the origin of the words quart, gram, 

 meter, vacuum, and substance. 



13. What are the proofs that the earth is sphere-like and not flat? 



14. Name some scientific methods or apparatus that have recently 

 been brought into our homes. Into factories. Into stores. Name 

 some that are used on the farm. In navigation. 



