Science — English

What type of bond is formed when electrons are shared between atoms?
A bond formed when electrons are shared between atoms is called a covalent bond. In this type of bond, the...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What type of animal is characterized by having feathers?
The type of animal characterized by having feathers is known as a bird. Birds are warm-blooded vertebrates and are unique...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What is the name of the force that keeps objects in orbit around a planet?
The name of the force that keeps objects in orbit around a planet is gravity. This fundamental force is a...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What is the pH level of pure water at 25 degrees Celsius?
The pH level of pure water at 25 degrees Celsius is approximately 7, which is considered neutral. This means that...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What is the primary gas found in Earth's atmosphere?
The primary gas found in Earth's atmosphere is nitrogen, which constitutes about 78% of the atmosphere. Oxygen makes up around...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What is the chemical symbol for the element hydrogen?
The chemical symbol for the element hydrogen is H. This lightest and most abundant element in the universe plays a...
Added: 18 Dec 2000
Updated: 12 Nov 2025
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What do we call the scientific study of animal behavior?
The scientific study of animal behavior is called ethology. Ethology focuses on understanding the behaviors of animals in their natural...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the main function of neurotransmitters?
The main function of neurotransmitters is to transmit signals between nerve cells (neurons) and other target cells. These chemicals facilitate...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What does the term biodiversity refer to?
The term biodiversity refers to the variety of life forms within a given ecosystem or on Earth as a whole....
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What phenomenon is responsible for the rainbow effect?
The phenomenon responsible for the rainbow effect is refraction, which occurs when light enters a medium at an angle, causing...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the main purpose of the cell's plasma membrane?
The main purpose of the cell's plasma membrane is to regulate the movement of substances in and out of the...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is bioluminescence?
Bioluminescence is the natural phenomenon where living organisms produce light through biochemical reactions. This ability is found in various species,...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the effect of a catalyst in a chemical reaction?
A catalyst in a chemical reaction reduces the activation energy required for the reaction to occur, thus increasing the reaction...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is symbiosis?
Symbiosis is a biological relationship between two different species that live in close proximity, often interacting in beneficial ways. This...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the name for the outermost layer of the Earth?
The name for the outermost layer of the Earth is the crust. It is a thin layer compared to the...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What are the two types of potential energy?
The two types of potential energy are gravitational potential energy and elastic potential energy. Gravitational potential energy depends on an...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the purpose of the scientific peer-review process?
The purpose of the scientific peer-review process is to ensure the quality and credibility of research before publication. Experts in...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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How does natural selection affect evolution?
Natural selection affects evolution by favoring organisms that are better adapted to their environment, leading to a change in the...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is the term for the biological clock in living organisms?
The term for the biological clock in living organisms is circadian rhythm. This internal clock regulates various physiological processes, including...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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What is a neutron?
A neutron is a subatomic particle found in the nucleus of an atom. It carries no electric charge, which differentiates...
Added: 17 Dec 2000
Updated: 12 Nov 2025
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