All Free Everyday Science MCQs with Answers

791. How many layers does the earth have?

• A. 1
• B. 2
• C. 3
• D. 4

Explanation: Earth is commonly described in three major layers: crust, mantle and core. More detailed models subdivide these layers, but the standard elementary classification has three.

792. Silver fish is the name of__________?

• A. Insect
• B. Fish
• C. Bird
• D. Mammal

Explanation: A silverfish is a small, wingless insect with silvery scales and a fish-like movement. Despite its name, it is not a fish.

793. Rearing of honey bees for honey production is called?

• A. Sericulture
• B. Apiculture
• C. Viticulture
• D. Bees culture

Explanation: Apiculture is the rearing and management of honey bees for honey, beeswax and other products. Sericulture concerns silk production, while viticulture concerns grape cultivation.

794. Sericulture is the study of which discipline ?

• A. silk production
• B. milk Production
• C. honey production
• D. forest timber production

Explanation: Sericulture is the commercial rearing of silkworms and the production of silk. The terms apiculture and dairy farming refer to honey-bee and milk production respectively.

795. Earthquakes occur most frequently at __________?

• A. Plate boundaries
• B. Plate surface
• C. Ocean beds
• D. All of the above

Explanation: Earthquakes occur most often where tectonic plates meet because plate movement concentrates stress along these boundaries. Ocean beds and other plate surfaces can experience earthquakes, but they are not all equally active.

796. Place directly above focus on Earth's surface is known as _________?

• A. Strike
• B. Comma
• C. Epicenter
• D. Origin

Explanation: The epicenter is the point on the Earth's surface directly above the focus, where the earthquake begins underground. The focus is also called the hypocenter, while the other listed terms are not the correct name.

797. Magnitude of energy released by an earthquake is calculated using ________?

• A. Earthquake scale
• B. Seismic scale
• C. Richter scale
• D. Temblor scale

Explanation: The Richter scale was traditionally used to express an earthquake's magnitude from the size of its seismic waves, which reflects energy released. Modern seismology often uses the moment magnitude scale for large earthquakes, but Richter is the intended option here.

798. Animals living in the Tree trunks are known as___________?

• A. Arboreal
• B. Volant
• C. Amphibious
• D. Aquaticx

Explanation: Arboreal animals live mainly in trees, including on branches and trunks. Volant refers to flying animals, while amphibious animals live both in water and on land.

799. Study of Soil is called__________?

• A. Pedology
• B. Pedagogy
• C. sociology
• D. Demography

Explanation: Pedology is the scientific study of soil, including its formation, classification, composition, and properties. Pedagogy concerns teaching, so the similar spelling is the main trap.

800. Nephology is study of_____________?

• A. Knowledge
• B. Clouds
• C. Rain
• D. None

Explanation: Nephology is the branch of atmospheric science concerned with clouds, including their formation and classification. The related study of rain is pluviology.