Everyday Science

The Moon is Earth's natural satellite because it orbits the Earth naturally, unlike the Sun, Venus, and Mercury which are not satellites but celestial bodies like stars and planets.

Oceanography is the scientific study of the ocean, including its ecosystems, currents, and geology. The other options refer to different fields: Algology is the study of algae, Phology is not a recognized scientific term, and Ornithology is the study of birds.

Venus is the hottest planet in our Solar System due to its thick atmosphere composed mainly of carbon dioxide, which creates a strong greenhouse effect, trapping heat and raising surface temperatures above those of Mercury, despite being farther from the Sun.

In eye donation, the cornea is the part of the eye that is typically donated and transplanted to restore vision in recipients with corneal damage or disease. Other parts like the retina, iris, or optic nerve are not commonly used for transplantation.

Capillarity is essential for many natural and everyday processes. Without capillarity, blotting paper would not absorb liquids, kerosene lamps relying on wick action would fail, and plants would be unable to transport water from roots to leaves, making their existence impossible.

Pressure is measured using a barometer, which measures atmospheric pressure. The other instruments measure different quantities: voltmeter measures voltage, lactometer measures milk density, and ammeter measures electric current.

CT Scan stands for Computed Tomography Scan, which is a medical imaging technique that uses computer-processed combinations of many X-ray measurements taken from different angles to produce cross-sectional images of specific areas of a scanned object.

As ice warms and begins to melt, its density decreases because water expands upon freezing. Therefore, as temperature rises and ice melts, the density decreases until it becomes liquid water, which is denser than ice.

When a single calendar month contains two full moons, the second full moon is commonly called a 'Blue moon'. This is a well-known term in astronomy and folklore.

Based on scientific data, an average adult human consumes approximately 22 moles of oxygen per day, which corresponds to about 500 to 550 liters of pure oxygen daily under normal resting conditions. This aligns with the option A (550 liters) given in the question. The other options (2500, 1050, 10000 liters) are significantly higher than typical physiological oxygen consumption values. The explanation is consistent with typical oxygen consumption rates at rest for an average human.