All Free Everyday Science MCQs with Answers

181. In which type of solar eclipse the Sun's center is covered by the moon, leaving its edges uncovered?

• A. Partial Solar Eclipse
• B. Total Solar Eclipse
• C. Annular Solar Eclipse
• D. None of the above

Explanation: An annular eclipse occurs when the Moon passes centrally in front of the Sun but appears too small to cover it completely, leaving a bright ring around its edge. In a total eclipse, the Sun's visible disk is fully covered.

182. Almost identical eclipses occur after 18 years and 11 days. This cycle is known as__________?

• A. Partial Eclipse cycle
• B. Total Eclipse Cycle
• C. Saros Cycle
• D. None of the above

Explanation: The Saros cycle is approximately 18 years, 11 days and 8 hours, after which similar Sun, Moon and Earth geometry produces a closely related eclipse. The extra hours shift the eclipse path geographically.

183. Day and night are the results of__________?

• A. Earth rotation around its axis
• B. Earth revolution
• C. Earth rotation accompanied with its revolution.
• D. None of these

Explanation: Earth's rotation makes different regions face toward or away from the Sun, producing the regular cycle of day and night. Revolution around the Sun mainly causes the yearly seasons.

184. How many longitudes are there in Globe?

• A. 90
• B. 180
• C. 270
• D. 360Physics

Explanation: The globe is divided into 360 degrees of longitude, with each meridian representing a line of longitude. The 180-degree east and 180-degree west designations meet at the same opposite meridian.

185. Which Planet is known as Watery Planet?

• A. Earth
• B. Mars
• C. Jupiter
• D. Mercury

Explanation: Earth is called the Watery Planet because about 71% of its surface is covered by oceans and other water bodies. The other listed planets have much less surface water.

186. Vernal equinox of northern hemisphere in March marks season of __________ ?

• A. Spring
• B. Summer
• C. Winter
• D. Autumn

Explanation: The March vernal equinox marks the beginning of spring in the Northern Hemisphere. It occurs when day and night are approximately equal in length.

187. The light of distant stars is affected by __________ ?

• A. The earth's atmosphere
• B. Interstellar dust
• C. both A and B
• D. None of these

Explanation: Starlight can be scattered and absorbed by Earth’s atmosphere and weakened or reddened by interstellar dust. Therefore, both listed factors can affect light from distant stars.

188. Mostly which gases found of the planet Jupiter?

• A. Hydrogen
• B. Chlorine
• C. Hydrogen and Helium
• D. Neon

Explanation: Jupiter is a gas giant composed mainly of hydrogen and helium, with hydrogen making up the larger share. Chlorine and neon are present only in tiny amounts, if at all.

189. NASA scientists have recently detected water vapor on which Jupiter's moon?

• A. Callisto
• B. Europa
• C. lo
• D. None

Explanation: Europa, one of Jupiter’s icy moons, has shown evidence of water vapour associated with possible plumes from its subsurface ocean. Callisto and Io are not the moon intended in this observation.

190. Which planet is called "red planet"?

• A. Mars
• B. Venus
• C. Jupiter
• D. Saturn

Explanation: Mars appears reddish because iron minerals in its surface rocks and dust have oxidized, forming iron oxides. This rusty dust gives Mars its familiar name, the Red Planet.