Atom
noun
The smallest particle of a chemical element that can exist....
Cell
noun
The smallest unit of life that can carry out basic life functions....
Chlorophyll
noun
The green pigment in plant cells that absorbs sunlight for photosynthesis....
Density
noun
The amount of mass in a given volume of a substance....
Friction
noun
A force that resists the motion between two surfaces in contact....
Inertia
noun
The tendency of an object to resist a change in its state of rest or motion....
Metamorphosis
noun
A process of transformation from one stage to a very different stage in an anima...
Mineral
noun
A naturally occurring solid substance with a specific chemical composition and c...
Molecule
noun
The smallest particle of a substance that retains the chemical properties of tha...
Orbit
noun
The curved path of an object around a star, planet, or moon....
Photosynthesis
noun
The process by which green plants convert sunlight, water, and CO₂ into glucose ...
Respiration
noun
The process by which living organisms take in oxygen and release carbon dioxide....
Sediment
noun
Solid material (sand, gravel, mud) that settles at the bottom of a liquid....
Tectonic
adjective
Relating to the structure of Earth's crust and the forces acting on it....
Thermometer
noun
An instrument used to measure temperature....
Velocity
noun
The speed of an object in a specific direction....
Wavelength
noun
The distance between one wave crest and the next in a series of waves....
Hypothesis
noun
A testable explanation or prediction about a scientific question....
Variable
noun
Any factor in an experiment that can be changed or controlled....
Weathering
noun
The breaking down of rocks and minerals at Earth's surface by physical or chemic...
Conduction
noun
The transfer of heat or electricity through direct contact....
Convection
noun
The transfer of heat by the movement of fluids (liquids or gases)....
Radiation
noun
The emission of energy as electromagnetic waves or particles....
Semiconductor
noun
A material with electrical conductivity between that of a conductor and an insul...
Decomposer
noun
An organism that breaks down dead organic material, returning nutrients to the e...