Science — English

What is the primary source of problematic greenhouse gas emissions?
The primary source of problematic greenhouse gas emissions is the burning of fossil fuels, such as coal, oil, and natural...
Added: 22 Apr 2000
Updated: 25 Nov 2025
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What is the primary substance that makes up bones?
The primary substance that makes up bones is calcium phosphate, which forms a hard mineral matrix that provides strength and...
Added: 22 Apr 2000
Updated: 28 Nov 2025
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Which subatomic particle has a relatively large mass and a positive charge?
The subatomic particle with a relatively large mass and a positive charge is the proton. Protons are found in the...
Added: 22 Apr 2000
Updated: 24 Nov 2025
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What is the name of the phenomenon that describes the spectral lines of moving objects?
The phenomenon that describes the spectral lines of moving objects is known as the Doppler effect. When an object moves...
Added: 22 Apr 2000
Updated: 07 Nov 2025
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What is the effect of acid rain on vegetation?
The effect of acid rain on vegetation is detrimental, as it can cause nutrient leaching, damage leaves, and impair photosynthesis....
Added: 22 Apr 2000
Updated: 06 Nov 2025
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What is the term for the measure of resistance in an electrical circuit?
The term for the measure of resistance in an electrical circuit is ohm. It quantifies how much a substance opposes...
Added: 22 Apr 2000
Updated: 15 Nov 2025
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What is the term for the orderly series of changes that occur in an ecosystem over time?
The term for the orderly series of changes that occur in an ecosystem over time is ecological succession. This process...
Added: 22 Apr 2000
Updated: 27 Nov 2025
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What is the primary component of a neuron?
The primary component of a neuron is the axon. The axon is a long, slender projection that conducts electrical impulses...
Added: 22 Apr 2000
Updated: 28 Nov 2025
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What is the primary ingredient in photosynthesis?
The primary ingredient in photosynthesis is carbon dioxide. Plants take in carbon dioxide from the atmosphere through small openings called...
Added: 22 Apr 2000
Updated: 21 Nov 2025
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What effect causes the bending of light as it passes through different mediums?
The effect that causes the bending of light as it passes through different mediums is known as refraction. This phenomenon...
Added: 22 Apr 2000
Updated: 03 Nov 2025
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What is the role of the nucleus in a cell?
The role of the nucleus in a cell is to house the cell's genetic material (DNA) and control its growth,...
Added: 22 Apr 2000
Updated: 05 Nov 2025
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What is the role of carotenoids in photosynthesis?
The role of carotenoids in photosynthesis includes capturing light energy and providing photoprotection to plant cells. Carotenoids absorb light in...
Added: 22 Apr 2000
Updated: 02 Nov 2025
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What type of cell generates the electric signals in the nervous system?
The type of cell that generates electric signals in the nervous system is known as a neuron. Neurons transmit signals...
Added: 22 Apr 2000
Updated: 21 Nov 2025
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What is the scientific study of animal structure and function called?
The scientific study of animal structure and function is called anatomy and physiology. Anatomy focuses on the physical structures of...
Added: 22 Apr 2000
Updated: 16 Nov 2025
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What is the term for organisms that produce their own food through photosynthesis?
Organisms that produce their own food through photosynthesis are termed autotrophs. These include plants, algae, and some bacteria, which convert...
Added: 22 Apr 2000
Updated: 19 Nov 2025
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What is the name of the process by which vegetation returns after a disturbance?
The name of the process by which vegetation returns after a disturbance is called ecological succession. This process can be...
Added: 22 Apr 2000
Updated: 11 Nov 2025
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What is the main cause of natural selection?
The main cause of natural selection is variation in traits among individuals within a population. These variations can affect an...
Added: 22 Apr 2000
Updated: 24 Nov 2025
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Which process uses sunlight to create food in plants?
The process that uses sunlight to create food in plants is known as photosynthesis. During photosynthesis, plants convert carbon dioxide...
Added: 22 Apr 2000
Updated: 09 Nov 2025
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What process occurs when organic matter is broken down by microorganisms?
The process that occurs when organic matter is broken down by microorganisms is called decomposition. This process involves the action...
Added: 22 Apr 2000
Updated: 21 Nov 2025
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What is the structure in a cell that carries out specific functions?
The structure in a cell that carries out specific functions is known as an organelle. Organelles, such as the mitochondria,...
Added: 22 Apr 2000
Updated: 26 Nov 2025
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