All Free Everyday Science MCQs with Answers

121. A shooting star is _________?

• A. Sun
• B. A comet
• C. A meteor
• D. An steroid

Explanation: A shooting star is the visible streak produced when a meteoroid burns or glows while passing through Earth’s atmosphere, so it is a meteor. It is not actually a star or a comet.

122. The Shape of earth is _________?

• A. Elliptical
• B. Oblate Spheroid
• C. Oval
• D. Spherical

Explanation: Earth is an oblate spheroid: rotation makes it slightly wider at the equator and flattened at the poles. “Spherical” is a useful rough description but is less scientifically precise.

123. Which is the only planet that rotates clockwise?

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

Explanation: Venus rotates retrograde, meaning clockwise when viewed from above its north pole, unlike most planets’ counterclockwise rotation. Its unusual rotation is linked to its slow spin and complex tidal history.

124. Planets having largest amount of Carbon Dioxide is ____________?

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

Explanation: Venus has an atmosphere made up of about 96% carbon dioxide, far more than the other listed planets. Mars also has a carbon-dioxide-rich atmosphere, but it is much thinner.

125. Milky Way Galaxy in which type?

• A. spiral
• B. Round
• C. Square
• D. Linear

Explanation: The Milky Way is a barred spiral galaxy, with a central bar and curved arms extending from it. “Round” is too general and does not identify its galaxy type.

126. Who among the following discovered the sunspots?

• A. Johannes Kepler
• B. Einstein
• C. Copernicus
• D. Galileo

Explanation: Galileo was among the first to observe and systematically record sunspots using a telescope in the early seventeenth century. Other astronomers made independent observations, but Galileo is the standard answer among these options.

127. The earth revolves around the sun at a speed of__________?

• A. 18.5 km/sec
• B. 26.6 km/sec
• C. 29 km/sec
• D. 31.9 km/sec

Explanation: Earth travels around the Sun at an average orbital speed of about 29.8 km/s, commonly rounded to 29 km/s. Its speed varies slightly because Earth’s orbit is elliptical.

128. What is the degree of rotation of the earth each hour?

• A. 1°
• B. 5°
• C. 7.5°
• D. 15°Exploring Educational Science Kits

Explanation: Earth rotates 360° in approximately 24 hours, so its average rotation is 15° per hour. The extra text after option d is unrelated to the question.

129. The Distance of Neptune From Sun is ________ astronomical unit.

• A. 28
• B. 30
• C. 32
• D. None of these

Explanation: Neptune’s average distance from the Sun is about 30 astronomical units, with one AU equal to the average Earth-Sun distance. Its actual distance changes slightly along its orbit.

130. NASA unveils the new Moon suit, which is known formally as____________?

• A. Exploration Extravehicular Mobility Unit (xEMU)
• B. Spacesuit
• C. Berkut
• D. Non of these

Explanation: NASA's planned lunar exploration suit was formally called the Exploration Extravehicular Mobility Unit, abbreviated xEMU. It is more specific than the general term spacesuit.