Science — English

What is the chemical reaction that occurs in fuel cells to produce energy?
The chemical reaction that occurs in fuel cells to produce energy is an electrochemical reaction. In a typical hydrogen fuel...
Added: 20 Apr 2000
Updated: 01 Dec 2025
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What is the scientific study of ecosystems known as?
The scientific study of ecosystems is known as ecology. Ecology examines the interactions between organisms and their environment, focusing on...
Added: 20 Apr 2000
Updated: 14 Nov 2025
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What is the force that pulls objects towards the center of the Earth called?
The force that pulls objects towards the center of the Earth is called gravity. This fundamental force arises from the...
Added: 20 Apr 2000
Updated: 11 Nov 2025
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What is the process that allows plants to absorb nutrients from the soil?
The process that allows plants to absorb nutrients from the soil is known as absorption. Plants utilize their root systems...
Added: 20 Apr 2000
Updated: 17 Nov 2025
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What is the term for a blood vessel that carries blood away from the heart?
The term for a blood vessel that carries blood away from the heart is an artery. Arteries transport oxygenated blood...
Added: 20 Apr 2000
Updated: 06 Nov 2025
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What is the study of interactions between different components of ecological systems called?
The study of interactions between different components of ecological systems is called ecology. This scientific branch examines relationships among organisms,...
Added: 20 Apr 2000
Updated: 03 Nov 2025
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In chemistry, what is the term for a substance made from two or more elements?
In chemistry, the term for a substance made from two or more elements is a compound. Compounds are formed when...
Added: 20 Apr 2000
Updated: 07 Nov 2025
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What part of the brain regulates vital functions like heart rate and breathing?
The part of the brain that regulates vital functions like heart rate and breathing is the medulla oblongata. Located in...
Added: 20 Apr 2000
Updated: 13 Nov 2025
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What type of chemical reaction absorbs energy from its surroundings?
The type of chemical reaction that absorbs energy from its surroundings is called an endothermic reaction. In this type of...
Added: 20 Apr 2000
Updated: 03 Nov 2025
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What is the main role of mitochondria in eukaryotic cells?
The main role of mitochondria in eukaryotic cells is to generate adenosine triphosphate (ATP), the cell's primary energy currency. Often...
Added: 20 Apr 2000
Updated: 02 Nov 2025
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What is the principle that states matter cannot be created or destroyed?
The principle that states matter cannot be created or destroyed is known as the Law of Conservation of Mass. This...
Added: 20 Apr 2000
Updated: 01 Dec 2025
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What is the process by which DNA is transcribed into RNA?
The process by which DNA is transcribed into RNA is known as transcription. During transcription, the enzyme RNA polymerase synthesizes...
Added: 20 Apr 2000
Updated: 01 Nov 2025
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What process describes the interaction between the atmosphere and the Earth's surface?
The process describing the interaction between the atmosphere and the Earth's surface is called atmospheric exchange. This interaction encompasses various...
Added: 20 Apr 2000
Updated: 15 Nov 2025
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What neurological process is responsible for sensory perception?
The neurological process responsible for sensory perception is known as transduction. During transduction, sensory receptors convert external stimuli—such as light,...
Added: 20 Apr 2000
Updated: 08 Nov 2025
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What is the primary purpose of a hypothesis in scientific research?
The primary purpose of a hypothesis in scientific research is to provide a testable prediction based on existing knowledge or...
Added: 20 Apr 2000
Updated: 08 Nov 2025
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What characteristic of water allows it to stabilize temperatures in organisms?
The characteristic of water that allows it to stabilize temperatures in organisms is known as its high specific heat capacity....
Added: 20 Apr 2000
Updated: 06 Nov 2025
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What is the term for the bond formed between two atoms when they share electrons?
The term for the bond formed between two atoms when they share electrons is called a covalent bond. This type...
Added: 20 Apr 2000
Updated: 29 Nov 2025
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What phenomenon occurs when light travels through a prism?
The phenomenon that occurs when light travels through a prism is called refraction. When light enters a prism, it changes...
Added: 20 Apr 2000
Updated: 01 Nov 2025
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What is the name of the organ responsible for filtering blood in the human body?
The organ responsible for filtering blood in the human body is the kidney. Each human has two kidneys, which remove...
Added: 20 Apr 2000
Updated: 12 Nov 2025
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What is the energy transformation that occurs during combustion?
The energy transformation that occurs during combustion is the conversion of chemical energy stored in fuel into thermal energy and...
Added: 20 Apr 2000
Updated: 28 Nov 2025
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