Which of the following  is  not soluble in water? 

a. moth ball

b. salt 

c. sugar 

d. vinegar 

Which of the following  liquids  do not mix  with water? 

a. liquid soap 

b. oil 

c. soy sauce 

d. vinegar 

Which system of the  body responsible  for the  circulation of the blood? 

( Identification) 

It refers to the animal  that has no backbone. 

Short answer. 

It refers to the  replica of planet Earth. 

( Short  answer )