Understand the science behind daily life through questions covering health, energy, environment, inventions and natural phenomena.
Questions are tracked as practiced when you open Show Answer & Explanation. Tracking stays only in this browser tab and no subject-test result is saved.
Which of the following vitamins helps in blood clotting?
Which everyday item uses the principle of total internal reflection to transmit data as light signals?
What is the powerhouse of the cell called?
Which type of chemical bond involves the sharing of electrons between atoms?
Which scientist discovered the law of gravity?
The process of forming new blood cells in the body occurs mainly in the:
Which of the following organs produces digestive enzymes as well as insulin?
The main function of the cerebrum in the human brain is to:
What is the term for an animal that eats both plants and meat?
The average adult human has approximately how many liters of blood?
Which of the following is used in the manufacture of soap?
What causes tides in the ocean?
The deficiency of vitamin B1 causes which disease?
Which element is essential for photosynthesis besides carbon dioxide and water?
Which scale measures the hardness of minerals, with diamond being the hardest at 10?
Which of the following is used to sterilize surgical instruments?
The pH value of pure water at room temperature is:
The primary function of the lymphatic system is to:
Which of the following is the main reason ice floats on water?
The chemical formula for common table salt is: