All Free Everyday Science MCQs with Answers

131. A rocket needs the speed of _______ to escape from earth's gravity?

• A. 22 miles per second
• B. 15 miles per second
• C. 12 miles per second
• D. 7 miles per second

Explanation: Earth's escape velocity is about 11.2 km/s, or approximately 7 miles per second. A rocket must reach this ideal speed, ignoring atmospheric drag and other losses, to escape Earth's gravity.

132. Huge cloud of gass and dust in the universe is called?

• A. Constellation
• B. Satellite
• C. Meteorite
• D. Nebula

Explanation: A nebula is a vast cloud of gas and dust in space, often associated with star formation or the remains of a dying star. A constellation is only an apparent pattern of stars.

133. Apart from Venus, which planet rotates from east to west?

• A. Jupiter
• B. Mars
• C. Uranus
• D. Neptune

Explanation: Uranus has retrograde rotation, meaning it turns from east to west relative to most planets. Its extreme axial tilt makes its rotation unusual as well as giving it severe seasonal changes.

134. Our sun is classified as ?

• A. A blue giant
• B. Yellow draft
• C. Supernova
• D. None of above

Explanation: The Sun is a yellow dwarf, technically a G-type main-sequence star. “Yellow draft” is evidently a spelling error for “yellow dwarf”; it is neither a blue giant nor a supernova.

135. In what year did Galileo first use an optical telescope to study the moon?

• A. 1492
• B. 1609
• C. 1212
• D. 1743Exploring Educational Science Kits

Explanation: Galileo began using an improved optical telescope for astronomical observations in 1609, including observations of the Moon. The unrelated text after option d is a scraping error.

136. A body can escape the gravitational pull of the earth if it is thrown up with a velocity of ________ miles/second ?

• A. 35
• B. 25
• C. 12
• D. 07Trying Interactive Physics Simulation Software

Explanation: Earth's escape velocity is about 11.2 km/s, which is approximately 7 miles per second. A launch speed of about 7 miles per second is therefore required when air resistance is ignored.

137. Earth revolves around the sun from?

• A. East to West
• B. West to East
• C. South to North
• D. North to South

Explanation: Earth's revolution around the Sun is from west to east when viewed from above the North Pole. Its daily rotation is also generally west to east, which helps anchor the direction.

138. Which of the following planets rotate from east to west on its exis?

• A. Jupiter, Mars
• B. Mercury, Saturn
• C. Venus, Uranus
• D. Neptune, Earth

Explanation: Venus and Uranus have retrograde rotation, meaning they rotate opposite to the usual eastward direction of most planets. Uranus is often described as rotating backward because its extreme axial tilt makes its spin direction appear retrograde.

139. The brightest colour emitted by the sun is:

• A. Violet
• B. Yellow-Green
• C. Green- Blue
• D. Red

Explanation: The Sun’s visible spectrum has its maximum intensity near the yellow-green region, although sunlight contains all visible colours. This is why yellow-green is used as the best answer rather than red or violet.

140. The subatomic particles arriving from outer space having high energy are called?

• A. Protons
• B. Electrons
• C. Cosmic rays
• D. None of the above

Explanation: Cosmic rays are high-energy particles, mainly protons and atomic nuclei, that arrive from outer space. They are not limited to electrons or protons alone.