Every Day Science MCQs with Explanations

Explanation

Atomic number is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Note : The Egyptians appear to have been the first to develop a solar calendar, using as a fix point the annual sunrise reappearance of the Dog star– Sirius, or Sothis in the eastern sky, which coincided with annual flooding of the River Nile. They constructed a calendar of 365 days, consisting of 12 months of 30 days each, with 5 days added at the year’s end. The Egyptians failure to account for the extra fraction of a day, however, caused their calendar to drift gradually into erro.

Explanation

The equator passes through 13 countries : Ecuador, Colombia, Brazil, Sao Tome & Principe, Gabon, Republic of the Congo, Democratic Republic of the Congo, Uganda, Kenya, Somalia, Maldives, Indonesia and Kiribati.

Explanation

The light a cat’s eyes gave off on a fence is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Trachoma is a disease of the eye caused by infection with the bacterium Chlamydia trachomatis. It is a public health problem in 44 countries and is responsible for the blindness or visual impairment of about 1.9 million people. Blindness from trachoma is irreversible.

Explanation

Radiology is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

Vitamin D is a fat-soluble vitamin, found naturally in every few foods. The term vitamin D refers to a family of compounds that are derived from cholesterol. There are two major forms of vitamin D: vitamin D2, found in plants and better known as ergocalciferol (or calciferol), and vitamin D3, found in animal tissues and often referred to as cholecalciferol.

Explanation

Liver is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

The single combination of pressure and temperature at which pure water, pure ice, and pure water vapour can coexist in a stable equilibrium occurs at exactly 273.16 kelvins (0.01 °C) and a pressure of 611.73 pascals (ca. 6.1173 millibars, 0.0060373057 atm).