Science — English

What layer of the Earth is composed mostly of solid rock?
The layer of the Earth composed mostly of solid rock is the lithosphere. This outer layer includes the crust and...
Added: 21 Mar 2000
Updated: 13 Nov 2025
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What is the scientific study of the structure and function of the immune system called?
The scientific study of the structure and function of the immune system is called immunology. This field explores the mechanisms...
Added: 21 Mar 2000
Updated: 04 Nov 2025
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Which part of the human skeleton protects the brain?
The part of the human skeleton that protects the brain is called the skull. Comprised of several bones fused together,...
Added: 21 Mar 2000
Updated: 24 Nov 2025
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What natural phenomenon is characterized by the rotation of the Earth on its axis?
The natural phenomenon characterized by the rotation of the Earth on its axis is called day and night cycle. This...
Added: 21 Mar 2000
Updated: 13 Nov 2025
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What type of energy is released during a nuclear reaction?
The type of energy released during a nuclear reaction is known as nuclear energy. This energy is generated during processes...
Added: 21 Mar 2000
Updated: 30 Nov 2025
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What is the process by which plants lose water vapor through small openings called?
The process by which plants lose water vapor through small openings is called transpiration. This process occurs mainly through stomata,...
Added: 21 Mar 2000
Updated: 30 Nov 2025
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What term describes the force of attraction between all masses in the universe?
The term that describes the force of attraction between all masses in the universe is gravity. Gravity is a fundamental...
Added: 21 Mar 2000
Updated: 28 Nov 2025
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What is the phenomenon where sound waves reflect off a surface?
The phenomenon where sound waves reflect off a surface is called echo. Echoes occur when sound waves bounce off surfaces,...
Added: 21 Mar 2000
Updated: 01 Nov 2025
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Which subatomic particles carry a positive charge?
The subatomic particles that carry a positive charge are known as protons. Protons, located in the nucleus of an atom,...
Added: 21 Mar 2000
Updated: 28 Nov 2025
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What is the main purpose of chlorophyll in photosynthesis?
The main purpose of chlorophyll in photosynthesis is to capture light energy from the sun. This green pigment, found in...
Added: 21 Mar 2000
Updated: 17 Nov 2025
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Which scientific principle states that energy cannot be created or destroyed?
The scientific principle that states that energy cannot be created or destroyed is known as the law of conservation of...
Added: 21 Mar 2000
Updated: 18 Nov 2025
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What process leads to the gradual breakdown of rocks into smaller particles?
The process that leads to the gradual breakdown of rocks into smaller particles is known as weathering. Weathering can be...
Added: 21 Mar 2000
Updated: 03 Nov 2025
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In genetics, what is the term for an observable characteristic of an organism?
In genetics, the term for an observable characteristic of an organism is called a phenotype. The phenotype encompasses traits such...
Added: 21 Mar 2000
Updated: 02 Nov 2025
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What type of lens is used to converge light rays?
A converging lens is used to converge light rays. This type of lens is thicker in the center than at...
Added: 21 Mar 2000
Updated: 18 Nov 2025
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Which scale is commonly used to measure the hardness of minerals?
The scale commonly used to measure the hardness of minerals is the Mohs scale. This scale ranks minerals based on...
Added: 21 Mar 2000
Updated: 14 Nov 2025
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What term is used to describe a substance that speeds up a chemical reaction without being consumed?
A substance that speeds up a chemical reaction without being consumed is called a catalyst. Catalysts lower the activation energy...
Added: 21 Mar 2000
Updated: 30 Nov 2025
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Which process explains the formation of clouds in the atmosphere?
The process that explains the formation of clouds in the atmosphere is known as condensation. This occurs when water vapor...
Added: 21 Mar 2000
Updated: 01 Nov 2025
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What is the chemical symbol for the element gold?
The chemical symbol for the element gold is Au. This symbol is derived from the Latin name for gold, Aurum,...
Added: 21 Mar 2000
Updated: 06 Nov 2025
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What phenomenon explains the change in frequency of a wave in relation to an observer moving towards or away from the source?
The phenomenon that explains the change in frequency of a wave in relation to an observer moving towards or away...
Added: 21 Mar 2000
Updated: 16 Nov 2025
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What kind of symmetry do most living organisms exhibit?
Most living organisms exhibit bilateral symmetry, a type of symmetry where the body can be divided into two identical halves...
Added: 21 Mar 2000
Updated: 08 Nov 2025
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