Physical science studies how matter and energy move and change. Words like kinetic, kelvin, and kilogram are part of physical science words that start with k, helping explain motion, temperature, and weight.
Learning these words makes it easier to talk about science in English and describe important ideas clearly.
List of Science Words That Start With K
- Kelvin
- Kinetic
- Karyotype
- Krypton
- Keratin
- Kaolinite
- Karyokinesis
- Kymograph
- Karyoplasm
- Karyomere
- Karyokine
- Kerogen
- Karyolith
- Karyochrome
- Kaolin
- Kite
- Kelp
- Kava
- Kymatology
- Kame
- Kettlehole
- Kobold

Physics Science Words That Start With K
Kelvin: the base unit of temperature used in the International System of Units, starting from absolute zero.
Kinetic: describing motion or the energy that bodies have because they are moving.
Kinematics: the study of how objects move without considering the forces that cause the motion.
Kilogram: the standard scientific unit for measuring mass, equal to one thousand grams.
Kilovolt: a measure of electrical potential equal to one thousand volts.
Kilowatt: a unit of power equal to one thousand watts, often used for engines or electric devices.
Keplerian: related to Johannes Kepler’s laws describing the motion of planets around the sun.
Kirchhoff’s Law: a rule in physics and electronics that explains how current and voltage behave in circuits.

Chemistry Science Words That Start With K
Krypton: a colorless noble gas element, symbol Kr, used in lights and lasers.
Ketone: an organic compound that contains a carbonyl group bonded to two carbon atoms.
Kaolin: a soft white clay used in ceramics, paper coating, and chemical testing.
Kaolinite: the main mineral in kaolin clay, formed from weathered aluminum silicates.
Kerosene: a liquid hydrocarbon fuel used for heating, lamps, and jet engines.
Kjeldahl Method: a chemical process used to measure nitrogen content in organic substances.
Kohlrausch Law: a principle that relates the conductivity of electrolytes to ion concentration.
Biology Science Words That Start With K
Keratin: a strong, fibrous protein found in hair, nails, feathers, and skin.
Kidney: a bean-shaped organ that removes waste and controls water balance in the body.
Karyotype: the full set of chromosomes in a cell, arranged by size and structure.
Kinesis: a type of movement in organisms that is triggered by a stimulus but not directed toward or away from it.
Karyogamy: the fusion of two cell nuclei during sexual reproduction.
Klebsiella: a genus of bacteria that can cause infections in humans.
Karyoplasm: the material found inside the nucleus of a cell.
Scientific Words Starting With K
Knowledge: the information and understanding gained through study, experience, or research.
Kinetics: the study of forces that cause motion or chemical reactions.
Krypton: a gaseous element used in lighting and lasers.
Knot: a unit of speed equal to one nautical mile per hour, used in navigation and science.
Kilobyte: a digital information unit equal to 1,024 bytes.
Math Science Words That Start With K
Kilo: a prefix meaning one thousand, used in metric measurement.
Kernel: the central or most important part of a mathematical function or set.
Knot: in geometry or topology, a loop in three-dimensional space.
Kappa: a Greek letter used in statistics to measure reliability or agreement.
Kurtosis: a measure that describes the shape of a probability distribution curve.
Earth Science Words Starting With K
Karst: a type of landscape formed when water dissolves limestone, creating caves and sinkholes.
Kilauea: an active volcano located in Hawaii known for continuous lava flows.
Kaolin: a fine white clay produced by the weathering of rocks rich in feldspar.
Kame: a mound of sand or gravel left by melting glaciers.
Krakatoa: a volcanic island in Indonesia famous for its 1883 eruption.
Kyanite: a blue mineral found in metamorphic rocks, used as an index of pressure conditions.
Technology and Engineering Words That Start With K
Keyboard: an input device used to type letters and commands into a computer.
Kilobyte: a unit of digital storage equal to 1,024 bytes.
Kinematics: in engineering, the study of motion in mechanisms without regard to force.
Keystroke: a single press of a key on a keyboard or control panel.
Klystron: a vacuum tube used to amplify microwave signals in radar and broadcasting.
Kilovolt: a measure of electrical potential used in high-voltage engineering systems.
Forensic Science Words With K
Keratin: protein from hair, nails, or skin used for DNA or trace analysis.
Karyotype: chromosomal pattern used to identify individuals or detect genetic conditions.
Kinetics: used to study motion and impact during crime or accident reconstruction.
Krypton: an element sometimes used in lighting analysis and forensic tracing.
Klebsiella: bacteria that can be tested in forensic pathology or clinical samples.
General Science Words That Start With K
Knowledge: understanding or awareness gained through learning or observation.
Kinetic: relating to movement or activity.
Kilo: a prefix that means a thousand times the base unit.
Kelvin: the standard unit of temperature based on absolute zero.
Kaolin: a natural mineral clay used across many scientific fields.
Krypton: an inert gas used in lighting and scientific research.
FAQs
Some common science words that start with K include kinetic, kelvin, karyotype, kite, and kelp.
Yes, examples include karyotype (biology), kelvin (physics), kymograph (physical science), and kaolinite (earth science).