PSC1515   Chapter 1 Practice Problems

 

  1. What is the step in the scientific process in which a prediction is made based on observations?

 

  1. What is the step in the scientific process in which an explanation given after experiments are performed for what is observed but which can later be proven to be incorrect?

 

  1. What is the last step in the scientific process after many scientists have obtained the same results?

 

  1. What is the basic unit for each of the following in the metric system?

 

    1. length
    2. mass
    3. time
    4. volume

 

  1. How many grams are there in 1 kg?
  2. How many milligrams (mg) are there in 1 gram?
  3. How many micrograms are there in 1 gram?
  4. What unit of volume is the same as 1 dm3?
  5. What unit of volume is the same as 1 cm3?
  6. What is the volume of a prism with the following dimensions:

   l = 56 cm    w = 47 cm   h = 15 cm.

 

 

  1. What is the area of a rectangle which is 75 inches long and 4 inches wide?

 

 

  1. What is the density of a metallic object which has a mass of 56 g and a volume of 4 cm3?

 

 

  1. What is the volume of a liquid that has a mass of 250 g and a density of .88 g/mL?

 

 

  1. What is the mass of 55.3 L of water?

 

 

 

 

 

  1. What are the symbols for each of the following?
    1. mass                          e. proportional           
    2. volume                       f. temperature
    3. time                            g. change
    4. density

 

      16. If        P = k       then is P directly or inversely proportional to V?

                            V

 

      17. If F = m x a    then is F directly or inversely proportional to a as long as m 

            is constant?

 

 

     Answers:

 

   1. hypothesis       2. theory         3. scientific law         4.   m, kg, s, L        5.  1000 g       6.   1000 mg     7. 1,000,000

   8.   liter (L)      9. milliliter (mL)       10. 39,480  cm3       11. 300 in2    12.   14 g/mL    13. 284 mL    14. 55.3 kg

  15.  m, V, t, r, a, T, D        16. inversely          17. directly