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 everyday process explains how noise-cancelling headphones work?
Which phenomenon explains why distant mountains sometimes appear bluish in colour?
The chemical formula for common table salt is:
Which continent is known as the driest inhabited continent on Earth?
Which type of chemical bond involves the transfer of electrons from one atom to another?
Which of the following is the main function of platelets in blood?
The scientific term for the process of blood clot formation is:
The disease caused by a deficiency of iodine in the diet is:
Which type of diet is most commonly recommended for preventing cardiovascular disease due to its emphasis on healthy fats?
Which of the following diseases is caused by a virus?
Which famous experiment proved that the Earth orbits the Sun rather than the Sun orbiting the Earth?
What is the name of the process by which plants lose water through their leaves?
Which of the following vitamins is synthesized by bacteria in the human intestine?
Which part of the nervous system is called the automatic system and controls involuntary body functions like digestion?
Which part of the digestive system absorbs most of the nutrients from food?
Which organ regulates blood sugar levels in the body?
Which photoreceptor cells in the eye are responsible for colour vision and function best in bright light?
Which of the following is the powerhouse of the cell?
The chemical process by which green plants make their own food is called:
The permanent hardness of water can be removed by adding: