A. Burning of coal
B. Conversion of water into steam
C. Digestion of food
D. Burning of paper
A. Carrot
B. Onion
C. Turnip
D. Cucumber
A. Graphite
B. Silica
C. Diamond
D. Iron oxide
Graphite is best suited for lubrication in air. It is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.
Temperature is the degree or intensity of heat present in a substance or object. Thus temperature is not a form of energy. Whereas others are forms of energy which can be converted form one form to another.
A. Lungs
B. Blood
C. Disorder of the Joints
D. Liver
Which of the following helps in clotting of blood?
A. Vitamin B1
B. Vitamin B2
C. Vitamin D
D. Vitamin K
Vitamin K is a necessary component of the body’s ability to clot blood. Without this function, a simple cut could result in uncontrolled bleeding. In addition, vitamin K has an important role in the formation of bone. Higher levels of vitamin K mean more calcium in the bone, increased bone density, and less risk of fractures