Science — English

Which layer of the atmosphere is closest to Earth?
The layer of the atmosphere closest to Earth is called the troposphere. It extends from the Earth's surface up to...
Added: 09 Apr 2000
Updated: 10 Nov 2025
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What is the study of human fossils and their evolution called?
The study of human fossils and their evolution is called paleoanthropology. This branch of anthropology focuses on the biological and...
Added: 09 Apr 2000
Updated: 01 Nov 2025
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What is the principle that states that energy in a closed system cannot be created or destroyed?
The principle that states that energy in a closed system cannot be created or destroyed is known as the law...
Added: 09 Apr 2000
Updated: 20 Nov 2025
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What is the technique used to separate substances based on size using a gel or filter?
The technique used to separate substances based on size using a gel or filter is called gel electrophoresis. This method...
Added: 09 Apr 2000
Updated: 26 Nov 2025
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What is the term for the study of heredity and how traits are passed down?
The term for the study of heredity and how traits are passed down is called genetics. This branch of biology...
Added: 09 Apr 2000
Updated: 27 Nov 2025
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What is the primary characteristic of an exothermic reaction?
The primary characteristic of an exothermic reaction is the release of energy, typically in the form of heat. In these...
Added: 09 Apr 2000
Updated: 08 Nov 2025
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What is the main purpose of the chloroplast in plant cells?
The main purpose of the chloroplast in plant cells is to conduct photosynthesis. Chloroplasts contain the pigment chlorophyll, which captures...
Added: 09 Apr 2000
Updated: 13 Nov 2025
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What is the term for the collection of living and nonliving components in a certain area?
The term for the collection of living and nonliving components in a certain area is called an ecosystem. Ecosystems consist...
Added: 09 Apr 2000
Updated: 01 Dec 2025
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What is the process by which species evolve over time known as?
The process by which species evolve over time is known as evolution. This concept, widely recognized through the theory of...
Added: 09 Apr 2000
Updated: 26 Nov 2025
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What is the unit of measurement for sound intensity?
The unit of measurement for sound intensity is the decibel (dB). This logarithmic unit quantifies the intensity of sound relative...
Added: 09 Apr 2000
Updated: 15 Nov 2025
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Which animal is considered the fastest land mammal?
The animal considered the fastest land mammal is the cheetah. Known for its incredible speed, a cheetah can reach speeds...
Added: 09 Apr 2000
Updated: 29 Nov 2025
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What is the scientific term for substance that can dissolve in water?
The scientific term for a substance that can dissolve in water is soluble. Soluble substances interact with water molecules, breaking...
Added: 09 Apr 2000
Updated: 17 Nov 2025
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What is the term for the movement of water through plant roots and leaves?
The term for the movement of water through plant roots and leaves is known as transpiration. This process involves water...
Added: 09 Apr 2000
Updated: 05 Nov 2025
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What is the phenomenon when matter changes from a gas to a liquid?
The phenomenon when matter changes from a gas to a liquid is called condensation. This process occurs when gas molecules...
Added: 09 Apr 2000
Updated: 11 Nov 2025
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What is the average temperature of the human body?
The average temperature of the human body is approximately 98.6 degrees Fahrenheit (or 37 degrees Celsius...
Added: 09 Apr 2000
Updated: 28 Nov 2025
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What type of ecosystem is characterized by a high level of biodiversity?
The type of ecosystem characterized by a high level of biodiversity is known as a rainforest. These ecosystems are home...
Added: 09 Apr 2000
Updated: 09 Nov 2025
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What is the biological term for the "fight or flight" response?
The biological term for the "fight or flight" response is the acute stress response. This physiological reaction occurs in response...
Added: 09 Apr 2000
Updated: 01 Dec 2025
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What is the common name for the scientific study of cells?
The common name for the scientific study of cells is cell biology. This field focuses on understanding the structure, function,...
Added: 09 Apr 2000
Updated: 09 Nov 2025
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What is the chemical process by which cells generate energy from glucose?
The chemical process by which cells generate energy from glucose is called cellular respiration. This process involves a series of...
Added: 09 Apr 2000
Updated: 13 Nov 2025
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What is the name of the element with atomic number one?
The name of the element with atomic number one is hydrogen. It is the lightest and most abundant element in...
Added: 09 Apr 2000
Updated: 06 Nov 2025
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