All Free Everyday Science MCQs with Answers

591. _____________ are positively (+) charged particles?

• A. Neutrons
• B. Electrons
• C. Protons
• D. None of These

Explanation: Protons carry a positive electric charge and are found in the nucleus. Electrons carry negative charge, while neutrons have no charge.

592. The protons and neutrons are found in the center of the atom, which is called the _________of the atom?

• A. Nucleus
• B. Headquarters
• C. Hub
• D. None of These

Explanation: The dense central region containing an atom’s protons and neutrons is called the nucleus. Electrons occupy the space surrounding the nucleus.

593. What are the three subatomic particles of an atom?

• A. Protons,Neutrons & Electrons
• B. Protons,Nucleus & Electrons
• C. Protons,Nucleus & Elements.
• D. Elements,Nucleus & Protons

Explanation: Protons, neutrons and electrons are the three basic subatomic particles commonly taught in atomic structure. The nucleus is a central part of the atom containing protons and neutrons, not a subatomic particle itself.

594. What are considered the building blocks of matter?

• A. Molecules
• B. Protons
• C. Elements
• D. Atoms

Explanation: Atoms are commonly called the building blocks of matter because they combine to form molecules and larger substances. Molecules are groups of bonded atoms, while elements are pure types of atoms.

595. All matter is made of ___________?

• A. Air
• B. Water
• C. Vibrations
• D. Atoms

Explanation: In basic science, matter is described as being made of atoms, which may join to form molecules or larger structures. Air and water are forms of matter, not the universal constituents of all matter.

596. _________ is anything that takes up space and has mass.

• A. Matter
• B. Gravity
• C. Energy
• D. Plasma

Explanation: Matter is defined by two properties: it has mass and occupies space. Gravity is a force, energy is the capacity to do work, and plasma is only one state of matter.

597. Pedology is study of ___________?

• A. Birds
• B. Languages
• C. Soils
• D. None of these

Explanation: Pedology is the scientific study of soil, including its formation, composition, classification, and distribution. The related term edaphology focuses more on soil in relation to plant growth.

598. There are many different types of frozen water on Earth. Collectively, they are known as the: ___________?

• A. Hydrosphere
• B. Cryosphere
• C. Frigid Zone
• D. Biosphere

Explanation: The cryosphere includes all frozen water on Earth, including glaciers, ice sheets, sea ice, snow and permafrost. The hydrosphere covers Earth’s water in all states, not only frozen water.

599. The sky appears blue because the earth's atmosphere __________?

• A. Scatters blue light
• B. Reflects blue light
• C. Transmits blue light
• D. Has actual blue cover

Explanation: Air molecules scatter the shorter blue wavelengths more strongly than the longer red wavelengths, so blue light reaches the observer from many directions. The atmosphere does not have a blue covering and the effect is not ordinary reflection.

600. Which one of the following is the main culprit in the thinning of Ozone layer in the earth's stratosphere?

• A. Carbon dioxide
• B. Chlorofluorocarbons
• C. Nitrogen oxides
• D. Methane

Explanation: Chlorofluorocarbons reach the stratosphere, where ultraviolet radiation releases chlorine atoms that catalytically destroy ozone. Carbon dioxide and methane mainly contribute to warming rather than being the principal cause of ozone thinning.