All Free Everyday Science MCQs with Answers

811. What is the world's warmest Sea?

• A. Red Sea
• B. Mediterranean Sea
• C. Caspian Sea
• D. Arabian Sea

Explanation: The Red Sea is commonly regarded as the world's warmest sea because it lies in a hot, arid region and has limited exchange with cooler ocean water. Its high evaporation also makes its water notably saline.

812. What is the warmest Ocean?

• A. Pacific Ocean
• B. Atlantic Ocean
• C. Arctic Ocean
• D. Indian Ocean

Explanation: The Indian Ocean is generally considered the warmest ocean because much of it lies in tropical latitudes and its northern part is enclosed by land. The Arctic Ocean is, by contrast, the coldest.

813. What is the name of the branch of the science that studies the ocean?

• A. Oceanography
• B. Algology
• C. Phology
• D. Orintology

Explanation: Oceanography is the scientific study of oceans, including their water, currents, marine life, geology, and atmosphere. Algology specifically concerns algae.

814. The lowest region of the earth's atmosphere comes between the earth and stratosphere. what is this region's name?

• A. Ionosphere
• B. Troposphere
• C. Stratosphere
• D. Mesosphere

Explanation: The troposphere is the lowest atmospheric layer, extending from Earth's surface up to the stratosphere. Most clouds and weather occur in this layer.

815. The study of the weather is called____________?

• A. Meteorology
• B. Weatherology
• C. Ecology
• D. Geology

Explanation: Meteorology studies the atmosphere and short-term weather phenomena such as temperature, wind, clouds, and rainfall. Geology studies Earth materials and structure, not daily weather.

816. How many time zones are there in the world?

• A. 22
• B. 12
• C. 16
• D. 24

Explanation: The conventional global time-zone system divides the 360 degrees of longitude into 24 zones of about 15 degrees each. Some regions use half-hour or quarter-hour offsets, but the standard answer remains 24.

817. What natural phenomena are measured by the Richter Scale?

• A. Volcanoes
• B. Typhoons
• C. Earth quacks
• D. Tsunami

Explanation: The Richter scale measures the magnitude of earthquakes by relating it to the amplitude of seismic waves. Volcanoes, typhoons, and tsunamis are not directly measured by this scale.

818. What melted rock eventually becomes lava?

• A. Iron
• B. Metals
• C. Magma
• D. Coal

Explanation: Magma is molten rock beneath Earth's surface; when it erupts and reaches the surface, it is called lava. Iron, other metals, and coal are not the general source described here.

819. What prevents the earth's atmosphere from drifting away into space?

• A. Gravity
• B. Ozone layer
• C. Troposphere
• D. Ecosystem

Explanation: Earth's gravity continually attracts atmospheric gases toward the planet and prevents them from escaping into space. The ozone layer protects against ultraviolet radiation but does not hold the atmosphere down.

820. Who is Considered as Father of Botany?

• A. Aristotle
• B. Gregor Joghn Mandle
• C. Theophrastus
• D. Corlous Linnaeous

Explanation: Theophrastus is regarded as the Father of Botany because he systematically described and classified many plants in his works. Aristotle is associated mainly with early zoology, while Linnaeus is known for modern biological classification.