c. 2:1
a. 50%
c. 70%
Choose the correct answer.
1. The ratio in which atoms of hydrogen and oxygen combine to form water is
a. 1:1
b. 1:2
d. 3:1
2. How much percentage of our body is made up of water?
b. 55%
d. 85%
3. Which of the following is not a fresh water source?
b. Well
c. Spring
d. Sea
4. Water cycle is a
a. continuous process
b. drinking process
c. non-continuous process
d. non-cyclic process
5. The dumping of waste in water is known as
a. water conservation
b. water pollution
c. water preservation
d. water resources
Answers
.........................................
Explanation:
1 Water molecules feature the combinations of hydrogen and oxygen atoms in a 2:1 ratio.
2 Up to 60% of the human adult body is water. According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.
3.
4 a continuous process
the water cycle, also known as the hydrologic cycle or the hydrological cycle, describes the continuous movement of water on, above and below the surface of the Earth. Wikipedia
5 b water pollution
Marine Dumping has been defined as the deliberate disposal at sea of wastes or other matter from vessels, aircraft, platforms or other man-made structures, as well as the deliberate disposal of these vessels or platforms themselves