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.
The energy released when a substance burns in the presence of oxygen is called:
What is the main function of platelets in blood?
Which tube connects the middle ear to the throat helping equalize air pressure?
Which common safety device in electrical circuits breaks the circuit when current exceeds a safe limit to prevent fires?
The disease night blindness is caused by the deficiency of:
Which part of the plant conducts photosynthesis?
Which renewable energy source uses moving air currents to generate electricity through turbines?
Which type of chemical bond involves the sharing of electrons between atoms?
Which scientist discovered the law of gravitation?
Which vitamin acts as an antioxidant protecting cells from damage and is found in nuts and seeds?
Which gas is most abundant in the Earth's atmosphere?
The gas that causes the pungent smell in rotten eggs is:
Which gas is released by volcanoes in large quantities?
Which essential mineral is critical for oxygen transport in the blood as a key component of hemoglobin?
Which everyday observation shows that pressure in a gas increases as temperature increases at constant volume?
The process by which water vapor changes into liquid water is called:
Which natural phenomenon explains why a compass needle always points toward magnetic north?
What is the boiling point of water at sea level in Celsius?
Which common kitchen substance is used as a natural antacid due to its alkaline properties?
Which of the following is the primary cause of the greenhouse effect intensifying over recent decades?