Science — English

What type of energy conversion occurs in a hydroelectric dam?
In a hydroelectric dam, the primary energy conversion is from potential energy of stored water to kinetic energy as water...
Added: 24 Jan 2000
Updated: 08 Nov 2025
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What type of reaction absorbs energy?
A endothermic reaction is a type of chemical reaction that absorbs energy, usually in the form of heat, from its...
Added: 24 Jan 2000
Updated: 13 Nov 2025
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What is the theory of plate tectonics?
The theory of plate tectonics explains how the Earth's outer shell, or lithosphere, is divided into several large and small...
Added: 24 Jan 2000
Updated: 07 Nov 2025
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What are the primary components of an atom?
The primary components of an atom are protons, neutrons, and electrons. Protons and neutrons reside in the nucleus at the...
Added: 24 Jan 2000
Updated: 06 Nov 2025
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What natural phenomenon can be measured using the Richter scale?
The natural phenomenon that can be measured using the Richter scale is an earthquake. The Richter scale quantifies the magnitude...
Added: 24 Jan 2000
Updated: 23 Nov 2025
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What does a microscope do?
A microscope is an optical instrument that magnifies small objects, allowing for detailed observation of specimens that are not visible...
Added: 24 Jan 2000
Updated: 18 Nov 2025
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What was the first synthetic polymer?
The first synthetic polymer was bakelite, created in 1907 by chemist Leo Baekeland. Bakelite is a thermosetting plastic made from...
Added: 24 Jan 2000
Updated: 23 Nov 2025
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What is the difference between mass and weight?
The difference between mass and weight lies in their definitions and underlying principles. Mass is a measure of the amount...
Added: 24 Jan 2000
Updated: 10 Nov 2025
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Which layer of the Earth is liquid?
The layer of the Earth that is liquid is the outer core. It lies beneath the mantle and surrounds the...
Added: 24 Jan 2000
Updated: 21 Nov 2025
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What is a covalent bond?
A covalent bond is a type of chemical bond formed when two atoms share one or more pairs of electrons....
Added: 24 Jan 2000
Updated: 05 Nov 2025
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What is the role of a control group in an experiment?
The role of a control group in an experiment is to serve as a baseline for comparison against the experimental...
Added: 24 Jan 2000
Updated: 10 Nov 2025
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What is entropy in thermodynamics?
In thermodynamics, entropy is a measure of disorder or randomness in a system. It quantifies the degree of energy dispersion...
Added: 24 Jan 2000
Updated: 11 Nov 2025
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How do fish breathe underwater?
Fish breathe underwater through a specialized respiratory system that utilizes gills. Water enters the fish's mouth and flows over the...
Added: 24 Jan 2000
Updated: 13 Nov 2025
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What is a supernova?
A supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle. This event...
Added: 24 Jan 2000
Updated: 13 Nov 2025
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What element is the most abundant in the universe?
The most abundant element in the universe is hydrogen, comprising roughly 75% of its elemental mass. Hydrogen is the simplest...
Added: 24 Jan 2000
Updated: 24 Nov 2025
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Which scientist is known for formulating the laws of motion?
The scientist known for formulating the laws of motion is Sir Isaac Newton. His work laid the foundation for classical...
Added: 24 Jan 2000
Updated: 17 Nov 2025
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What is the main distinguishing feature of mammals?
The main distinguishing feature of mammals is the presence of mammary glands, which produce milk for feeding their young. This...
Added: 24 Jan 2000
Updated: 27 Nov 2025
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Which type of radiation is emitted during radioactive decay?
During radioactive decay, particles such as alpha particles, beta particles, or gamma rays are emitted. This process involves the transformation...
Added: 24 Jan 2000
Updated: 19 Nov 2025
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What is the function of the ribosomes in a cell?
The function of ribosomes in a cell is to synthesize proteins by translating messenger RNA (mRNA) sequences into amino acid...
Added: 24 Jan 2000
Updated: 01 Dec 2025
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What are the different states of matter?
The different states of matter are solid, liquid, gas, and plasma. Solids have a fixed shape and volume, liquids take...
Added: 24 Jan 2000
Updated: 12 Nov 2025
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