Everyday Science

The flower called 'Queen of Water' is the Lily, often referred to as the water lily due to its aquatic habitat and beautiful blooms floating on water surfaces.

Tannic acid is commonly used in inks, especially iron gall ink, due to its ability to bind with iron salts and produce a dark pigment. The other acids listed are not typically used in ink production.

Dinosaurs and many other species went extinct approximately 66 million years ago at the end of the Cretaceous period, marking the Cretaceous-Paleogene extinction event.

Psoriasis is a common skin condition characterized by red, inflamed, and often scaly patches of skin that can be itchy or sore. It is an autoimmune disorder causing accelerated skin cell turnover, leading to redness and irritation. While other skin conditions like eczema also cause redness and irritation, psoriasis is a well-known cause of these symptoms. The other options are unrelated: Hypermetropia is an eye condition, Leukoderma involves loss of skin pigment (white patches), and Diphtheria is a bacterial infection affecting the throat and respiratory system, not the skin.

Reptiles typically hibernate during winter to survive cold temperatures when food is scarce. This period of dormancy helps them conserve energy until conditions improve.

Silicon is a well-known semiconductor material, meaning it has electrical conductivity between that of a conductor and an insulator. This property makes it essential in electronic devices.

The fan, specifically the ceiling fan, was invented by Schuyler Skaats Wheeler in 1882. The other options are incorrect inventors related to different inventions.

Carbon dioxide is commonly used to extinguish fires because it displaces oxygen, which is necessary for combustion, thereby suffocating the fire. Nitrous oxide and methane are not used for fire extinguishing.

The chronometer, a precise timekeeping device essential for navigation, was invented by John Harrison in the 18th century to solve the problem of determining longitude at sea.

Vitamin A is also known as Retinol, which is its chemical name. The other options are names of different vitamins: Riboflavin (Vitamin B2), Ascorbic Acid (Vitamin C), and Thiamin (Vitamin B1).