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 astronomical event marks the day with the longest period of daylight in the Northern Hemisphere?
Which part of the human brain regulates vital involuntary functions such as breathing and heartbeat?
Which part of the human ear is primarily responsible for maintaining balance?
Which gas commonly used in refrigerators and air conditioners was historically linked to ozone layer depletion?
Which part of the human body regulates temperature through sweating and blood vessel dilation?
Which common everyday substance is used to test for the presence of glucose in food and turns brick-red when heated?
Which everyday device converts direct current into alternating current for household appliance use?
What is the pH value of pure water?
Which type of lens is used to correct myopia or nearsightedness?
Which of the following is the main function of the ribosomes in a cell?
Which phenomenon explains why a straw placed in a drink allows liquid to be sucked upward?
The Richter scale is used to measure the intensity of:
Which part of the human respiratory system is primarily responsible for warming and filtering incoming air?
Which gas is most responsible for the depletion of the ozone layer?
Which household appliance operates on the principle of electromagnetic induction to heat food?
Which everyday device measures body temperature by detecting the infrared radiation emitted from the ear canal or forehead?
Which water purification process removes dissolved salts and impurities by forcing water through a semi-permeable membrane?
Which gas exchange membrane structure in the lungs maximizes surface area for efficient breathing?
Which cell organelle is primarily responsible for breaking down waste materials and cellular debris?
Which force is primarily responsible for keeping planets in orbit around the sun?