Science — English

What is a scientific theory?
A scientific theory is a well-substantiated explanation of an aspect of the natural world, developed through a process of observation,...
Added: 25 Jan 2000
Updated: 04 Nov 2025
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What part of the cell is responsible for energy production?
The part of the cell responsible for energy production is the mitochondrion. Often referred to as the powerhouse of the...
Added: 25 Jan 2000
Updated: 28 Nov 2025
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What is the study of behavior in animals called?
The study of behavior in animals is called ethology. Ethologists observe and analyze animal behavior in natural environments, focusing on...
Added: 25 Jan 2000
Updated: 10 Nov 2025
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What is the theory that describes the origins of the universe?
The theory that describes the origins of the universe is the Big Bang Theory. This theory posits that approximately 13.8...
Added: 25 Jan 2000
Updated: 02 Nov 2025
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What is an example of a chemical reaction?
An example of a chemical reaction is the reaction between vinegar and baking soda, which produces carbon dioxide gas. This...
Added: 25 Jan 2000
Updated: 12 Nov 2025
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Which body system is responsible for hormone production?
The body system responsible for hormone production is the endocrine system. It comprises various glands that secrete hormones into the...
Added: 25 Jan 2000
Updated: 07 Nov 2025
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What is the process by which water vapor turns back into liquid called?
The process by which water vapor turns back into liquid is called condensation. This process occurs when water vapor cools...
Added: 25 Jan 2000
Updated: 11 Nov 2025
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What is an autotroph?
An autotroph is an organism that produces its own food using photosynthesis or chemosynthesis. Examples include plants, algae, and some...
Added: 25 Jan 2000
Updated: 19 Nov 2025
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What is the primary way in which energy is transferred through ecosystems?
The primary way in which energy is transferred through ecosystems is via food chains and food webs. Energy flows from...
Added: 25 Jan 2000
Updated: 09 Nov 2025
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What is the difference between a chemical change and a physical change?
The difference between a chemical change and a physical change is that a chemical change alters the chemical composition of...
Added: 25 Jan 2000
Updated: 13 Nov 2025
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What is the purpose of a scientific model?
The purpose of a scientific model is to represent, explain, or predict phenomena in the natural world. Models can simplify...
Added: 25 Jan 2000
Updated: 14 Nov 2025
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What does the term “species” refer to in biology?
In biology, the term species refers to a group of organisms that can interbreed and produce fertile offspring under natural...
Added: 25 Jan 2000
Updated: 08 Nov 2025
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What is a reaction that releases heat energy called?
A reaction that releases heat energy is called an exothermic reaction. In these reactions, energy is released as products form,...
Added: 25 Jan 2000
Updated: 23 Nov 2025
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What is the function of the circulatory system?
The function of the circulatory system is to transport blood, nutrients, gases, and waste products throughout the body. It plays...
Added: 25 Jan 2000
Updated: 02 Nov 2025
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What is the main purpose of a scientific experiment?
The main purpose of a scientific experiment is to test a specific hypothesis by manipulating variables and observing the results....
Added: 25 Jan 2000
Updated: 07 Nov 2025
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What is an example of a physical change?
An example of a physical change is the melting of ice to form water. In this process, the composition of...
Added: 25 Jan 2000
Updated: 05 Nov 2025
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What does the term “allele” refer to in genetics?
In genetics, an allele refers to one of the different forms of a specific gene, which can result in various...
Added: 25 Jan 2000
Updated: 12 Nov 2025
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What is the function of the diaphragm in respiration?
The function of the diaphragm in respiration is to facilitate breathing by contracting and relaxing. When the diaphragm contracts, it...
Added: 24 Jan 2000
Updated: 19 Nov 2025
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What is the main characteristic of a mineral?
The main characteristic of a mineral is that it must be a naturally occurring, inorganic solid with a definitive crystal...
Added: 24 Jan 2000
Updated: 21 Nov 2025
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How do plants release oxygen into the atmosphere?
Plants release oxygen into the atmosphere through a process called photosynthesis. During this process, they convert carbon dioxide and water...
Added: 24 Jan 2000
Updated: 12 Nov 2025
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