Science — English

What is an element defined as?
An element is defined as a pure substance that cannot be broken down into simpler substances by chemical means. Each...
Added: 22 Feb 2000
Updated: 15 Nov 2025
ℹ️
What is the role of water in biological systems?
The role of water in biological systems is crucial as it serves multiple functions essential for life. Water acts as...
Added: 22 Feb 2000
Updated: 22 Nov 2025
ℹ️
What is a hypothesis in the scientific method?
A hypothesis in the scientific method is a testable and falsifiable statement or prediction regarding the relationship between variables. It...
Added: 22 Feb 2000
Updated: 15 Nov 2025
ℹ️
What is the purpose of chloroplasts in plant cells?
The purpose of chloroplasts in plant cells is to facilitate photosynthesis, the process by which plants convert light energy into...
Added: 22 Feb 2000
Updated: 21 Nov 2025
ℹ️
What is the effect of gravity on mass and weight?
The effect of gravity on mass and weight is fundamental to understanding physics. Mass is a measure of the amount...
Added: 22 Feb 2000
Updated: 17 Nov 2025
ℹ️
What is a chemical formula?
A chemical formula is a symbolic representation of a compound that indicates the types and numbers of atoms present. It...
Added: 22 Feb 2000
Updated: 21 Nov 2025
ℹ️
What factors contribute to climate change?
Factors that contribute to climate change include increased concentrations of greenhouse gases, such as carbon dioxide, methane, and nitrous oxide,...
Added: 22 Feb 2000
Updated: 18 Nov 2025
ℹ️
What is a pandemic?
A pandemic is defined as an outbreak of a disease that occurs on a global scale, affecting a large number...
Added: 22 Feb 2000
Updated: 14 Nov 2025
ℹ️
What is the function of the immune system?
The function of the immune system is to protect the body from pathogens, such as bacteria, viruses, fungi, and parasites....
Added: 22 Feb 2000
Updated: 23 Nov 2025
ℹ️
What is the difference between aerobic and anaerobic respiration?
The difference between aerobic and anaerobic respiration lies primarily in the presence or absence of oxygen. Aerobic respiration occurs in...
Added: 22 Feb 2000
Updated: 13 Nov 2025
ℹ️
What organelle is responsible for detoxifying harmful substances in a cell?
The organelle responsible for detoxifying harmful substances in a cell is the smooth endoplasmic reticulum (SER). This membranous organelle is...
Added: 22 Feb 2000
Updated: 30 Nov 2025
ℹ️
What type of symmetry is exhibited by jellyfish?
Jellyfish exhibit radial symmetry, which means their body parts are arranged around a central axis. This type of symmetry allows...
Added: 22 Feb 2000
Updated: 01 Nov 2025
ℹ️
What is the primary purpose of biodiversity conservation?
The primary purpose of biodiversity conservation is to protect the variety of life on Earth, ensuring the survival of various...
Added: 22 Feb 2000
Updated: 15 Nov 2025
ℹ️
What are the three major domains of life?
The three major domains of life are Bacteria, Archaea, and Eukarya. Bacteria are unicellular organisms characterized by their prokaryotic cell...
Added: 22 Feb 2000
Updated: 26 Nov 2025
ℹ️
What is photosynthesis' chemical equation?
The chemical equation for photosynthesis is commonly expressed as: 6CO₂ + 6H₂O + light energy → C₆H₁₂O₆ + 6O₂. In...
Added: 22 Feb 2000
Updated: 12 Nov 2025
ℹ️
What is the primary mechanism of heat transfer?
The primary mechanism of heat transfer is through three processes: conduction, convection, and radiation. Conductive heat transfer occurs when heat...
Added: 22 Feb 2000
Updated: 08 Nov 2025
ℹ️
What is the role of the skeletal system in the body?
The role of the skeletal system in the body is multifaceted. It provides structure and support, enabling an organism to...
Added: 22 Feb 2000
Updated: 19 Nov 2025
ℹ️
What is the main difference between renewable and non-renewable energy sources?
The main difference between renewable and non-renewable energy sources lies in their availability and sustainability. Renewable energy sources, such as...
Added: 22 Feb 2000
Updated: 27 Nov 2025
ℹ️
What is apoptosis?
Apoptosis is a form of programmed cell death that plays a crucial role in development and homeostasis within multicellular organisms....
Added: 22 Feb 2000
Updated: 29 Nov 2025
ℹ️
What structure protects the brain and spinal cord?
The structure that protects the brain and spinal cord is called the meninges, which consists of three protective membranes: the...
Added: 22 Feb 2000
Updated: 21 Nov 2025
ℹ️