ANSWERS TO SCIENCE MODULE 1

1.   If the hydrogen ion concentration of a solution is 1 x 10^-5. What is the pH of the solution?

A.    1

B.     10

C.     5

D.    2

2.   If the hydrogen ion concentration of a solution is 1 x 10^-3. What can you say about the solution?

A.     It is a weak acid

B.      It is a strong acid

C.      It is a weak base

D.     It is a strong base

3. A student placed a blue ink drop in a jar of water. After some time, the whole water turned blue.  

Which of the following processes occurred?

      A. Osmosis

      B. Simple Diffusion

      C. Active Diffusion

      D. Facilitated diffusion

4. Water enters the roots of plants by which of the following process?

     A. Osmosis

     B. Simple Diffusion

     C. Active Diffusion

     D. Facilitated diffusion

5. Oxygen from the atmosphere enters the blood from the lung by ____________________ .

    A. Osmosis

    B. Simple Diffusion

    C. Active Diffusion

    D. Facilitated diffusion

6. During the formation of sodium chloride (NaCl), sodium loses one electron from its outermost shell (valence shell) to chlorine. Which type of bond is formed between these two atoms?  

   A. Metallic bond

   B. Ionic bond

   C. Covalent bond

   D. hydrogen bond

7. When a red blood cell (RBC) is placed in a hypertonic solution, it will ____________________

   A. Increase in size

   B. Shrink

   C. Rupture

   D. Remain the same

8. How would cream crackers taste if it is chewed slowly?

    A. Sweet    

    B. Bitter    

    C. Sour      

    D. Tasteless

9. What will be the end-product of sucrose digestion?

    A. glucose    

    B. glucose and galactose  

    C. galactose and fructose    

    D. glucose and fructose

10. Which of the following will turn blue-black when tested with Lugol's solution?

    A. protein  

    B. starch    

    C. glucose    

    D. fructose