Every Day Science MCQs with Explanations

Explanation

Microwaves are used for satellite communication because microwaves can pass straight through the atmosphere and connect antennas on earth to a satellite in earth’s orbit.

Explanation

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

Explanation

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

Explanation

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.

Explanation

Na2CO3 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.

Explanation

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

Explanation

Cataracts are the clouding of the lens of your eye, which is normally clear. Most cataracts develop slowly over time, causing symptoms such as blurry vision.

Explanation

Convection occurs due to the differences in density, and only happens in gases or liquids. The heat is transferred by the movement of a heated fluid, which is air or water.

Explanation

Vitamin B3, also called niacin, is one of the eight B-complex water-soluble vitamins. Niacin has a wide range of uses in the body, helping functions in the digestive system, skin and nervous system.