1. Tripling the linear size of an object (i.e., 3 times its linear size) increases its area by a factor of
   
   
   1. 3 and its volume by 6
   2. 6 and its volume by 9
   3. 9 and its volume by 27
   4. none of these
   
   
   
2. Compared to a bar of pure silver, the density of a pure silver ring is
   
   
   1. less
   2. the same
   3. more
   4. na
   
   
   
3. When a load is placed on the middle of a horizontal beam supported at each end, the bottom part of the beam undergoes (see figure below)
   
   
   1. tension
   2. compression
   3. neither tension or compression
   4. exhaustion
      
   
   
   
4. Which of the following properties is affected when a loaf of bread is squeezed.
   
   
   1. weight
   2. mass
   3. volume
   4. chemical composition
   
   
   
5. Suppose all sizes of potatoes are selling at the same price per pound. If you peel them, you will get more potato for your money if you buy
   
   
   1. small potatoes
   2. medium potatoes
   3. large potatoes
   4. makes no difference
   
   
   
6. Which cooks faster in boiling water
   
   
   1. a whole potato
   2. a sliced potato
   3. both cook the same
   4. na

PART  II      Fill  in  Blanks

7. If a 20 N object stretches a spring 10 cm., what is the weight of an object that stretches the same spring 5 cm.?    ________ N
   
   
8. A metal block has a mass of 10 grams and a volume of 2 cubic centimeters (cc). Its density is  ___________ g/cc
   
   
9. A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. Its volume is  ___________ cubic meters
   
   
10. If a 10 N weight stretches a spring 5 cm., a 30 N weight will stretch the same spring   ________ cm.
    
    

PART  III     True  or  False

11. The density of a chocolate bar when cut in half is decreased.
    
    
12. Arches are strong structures due to the compressive forces pushing the stones together.
    
    
13. Strength is dependent on the cross-sectional area.
    
    
14. The amount of stretch of a steel spring is indirectly proportional to a force hanging from it.
    
    
15. The large surface area of an elephants ears increases its radiating surface to promote cooling.