Science Words That Start With P: Vocabulary List with Meanings

Science words that start with P help improve scientific vocabulary across subjects like biology, chemistry, physics, astronomy, environmental science, geology, medical science, and computer science. Key examples include pressure, prism, polymer, photosynthesis, proton, plasma, pendulum, photosystem, platelet, pathogen, phosphorus, pulsar, permafrost, paleontology, and photovoltaic.

These commonly used science terms that start with P help students and kids understand core concepts and improve their subject knowledge.

A Complete List of Science Words That Start With P

• Paleontology
• Paleoecology
• Paleoclimate
• Pandemic
• Pancreas
• Parasite
• Parasitology
• Parenchyma
• Particle
• Particle Accelerator
• Particle Physics
• Partial Pressure
• Pathogen
• Pathology
• Pattern Formation
• Peat
• Pedosphere
• Peptide
• Perception
• Periodic Table
• Periodic Trend
• Permafrost
• Permeability
• Permineralization
• Peroxisome
• Petrology
• pH
• Phase
• Phase Diagram
• Phase Transition
• Phenotype
• Phenology
• Phloem
• Phospholipid
• Phosphorylation
• Phosphorus
• Photon
• Photosynthesis
• Photoelectric Effect
• Photolysis
• Photometer
• Photoreceptor
• Phototropism
• Phylogeny
• Physiology
• Physics
• Phytoplankton
• Piezoelectricity
• Pigment
• Pinocytosis
• Pituitary Gland
• Plasma
• Plasma Membrane
• Plate Boundary
• Plate Tectonics
• Plasmid
• Plasticity
• Polar Molecule
• Polarization
• Polarity
• Pollen
• Pollination
• Polymer
• Polymerization
• Polypeptide
• Population
• Population Density
• Potential Energy
• Power
• Precipitation
• Pressure
• Primary Productivity
• Probability
• Probe
• Prokaryote
• Proton
• Protostar
• Protist
• Pulmonary System
• Pulse
• Purine
• Pyrimidine
• Pyroclastic Flow
• Pyrometer
• Pyruvate

Physics Science Words With P

Power

• Power is the rate of doing work.
• It measures how fast energy is used.

Pressure

• Pressure is a force applied over an area.
• Gases and liquids exert pressure.

Potential Energy

• Potential energy is stored energy.
• It depends on the position.

Projectile Motion

• Projectile motion follows a curved path.
• Gravity affects the motion.

Pulse

• A pulse is a single wave disturbance.
• It travels through a medium.

Photon

• A photon is a particle of light.
• It carries energy.

Period

• The period is the time for one cycle.
• Waves repeat after one period.

Pendulum

• A pendulum swings back and forth.
• It shows periodic motion.

Plasma

• Plasma is an ionized gas.
• It is the fourth state of matter.

Polarization

• Polarization limits wave vibration direction.
• It applies to light waves.

Chemistry Science Words With P

Proton

• A proton has a positive charge.
• It is found in the nucleus.

Periodic Table

• The periodic table organizes elements.
• It shows patterns.

Polymer

• A polymer is a long molecule.
• Plastics are polymers.

pH Scale

• The pH scale measures acidity.
• It ranges from 0 to 14.

Precipitation Reaction

• This reaction forms a solid.
• It occurs in solutions.

Physical Change

• A physical change alters form only.
• No new substance forms.

Product

• Products form after reactions.
• Reactants change into products.

Purification

• Purification removes impurities.
• It improves quality.

Phase Change

• Phase change alters state.
• Melting is a phase change.

Phosphorus

• Phosphorus is a nonmetal element.
• It is essential for life.

Biology Science Words With P

Photosynthesis

• Photosynthesis makes food in plants.
• It uses sunlight.

Protein

• Proteins build body tissues.
• They are made of amino acids.

Population

• A population is a group of organisms.
• They live in one area.

Predator

• A predator hunts other animals.
• It feeds on prey.

Prey

• Predators hunt prey.
• It forms food chains.

Pollination

• Pollination transfers pollen.
• It enables fertilization.

Parasite

• A parasite lives on a host.
• It harms the host.

Pathogen

• Pathogens cause disease.
• They include bacteria and viruses.

Plant Cell

• Plant cells have cell walls.
• They contain chloroplasts.

Phenotype

• Phenotype is the visible traits.
• Genes influence phenotype.

Math Science Words With P

Perimeter

• Perimeter is the total boundary length.
• It surrounds shapes.

Probability

• Probability measures chance.
• It ranges from 0 to 1.

Prime Number

• Prime numbers have two factors.
• They are divisible by one and themselves.

Percentage

• A percentage represents parts of a hundred.
• It uses the % symbol.

Product

• The product is the result of multiplication.
• Numbers combine to form products.

Point

• A point shows position.
• It has no size.

Polygon

• A polygon has straight sides.
• Triangles are polygons.

Parabola

• A parabola is a curved graph.
• Quadratic equations form it.

Positive Number

• Positive numbers are greater than zero.
• They lie right of origin.

Proportion

• Proportion compares ratios.
• It shows equality.

Technology Words That Start With P

Processor

• A processor performs calculations.
• It is the computer’s brain.

Program

• A program gives instructions.
• Computers run programs.

Password

• Passwords protect systems.
• They prevent unauthorized access.

Programming Language

• These languages write code.
• Examples include Python.

Printer

• Printers produce hard copies.
• They print documents.

Platform

• A platform supports applications.
• Software runs on platforms.

Protocol

• Protocols define communication rules.
• Networks use protocols.

Pixel

• Pixels form digital images.
• Screens contain pixels.

Power Supply

• Power supplies deliver electricity.
• Devices need power.

Projector

• Projectors display images.
• They enlarge visuals.

Earth Science Words That Start With P

Planet

• A planet orbits a star.
• Earth is a planet.

Plate Tectonics

• This theory explains crust movement.
• Plates move slowly.

Pollution

• Pollution harms the environment.
• It affects air and water.

Precipitation

• Precipitation includes rain and snow.
• It falls from clouds.

Permafrost

• Permafrost is frozen soil.
• It stays frozen long-term.

Plain

• A plain is flat land.
• It supports farming.

Peninsula

• A peninsula is land surrounded by water.
• It connects to the mainland.

Paleontology

• Paleontology studies fossils.
• It reveals past life.

Porosity

• Porosity measures empty spaces.
• Rocks have porosity.

Pressure System

• Pressure systems affect the weather.
• They cause winds.

Astronomy Words That Start With P

Planet

• Planets orbit stars.
• They do not produce light.

Pulsar

• A pulsar is a rotating neutron star.
• It emits radiation.

Parallax

• Parallax measures star distance.
• It uses apparent shift.

Perihelion

• Perihelion is the closest orbit point.
• Planets reach it near the Sun.

Protostar

• A protostar is a forming star.
• It gathers gas.

Planetary Ring

• Planetary rings surround planets.
• Saturn has rings.

Photon

• Photons carry light energy.
• They travel fast.

Polar Orbit

• Polar orbits pass over the poles.
• Satellites use them.

Phase

• Phases describe appearance changes.
• The Moon has phases.

Proper Motion

• Proper motion shows star movement.
• It occurs slowly.

Science Instruments That Start With P

Pressure Gauge

• A pressure gauge measures pressure.
• Used in systems.

pH Meter

• A pH meter measures acidity.
• Used in labs.

Photometer

• Photometers measure light intensity.
• Used in physics.

Polarimeter

• This measures polarization.
• Used in optics.

Pipette

• Pipettes transfer liquids.
• They are precise.

Petri Dish

• Petri dishes grow cultures.
• Used in biology.

Pyrometer

• Pyrometers measure high temperature.
• Used in industry.

Pulse Oximeter

• This measures oxygen saturation.
• Used in medicine.

Particle Accelerator

• Accelerators speed particles.
• Used in physics.

Power Analyzer

• This analyzes electrical power.
• Used in engineering.

Forensic Science Words Starting With the Letter P

Postmortem

• Postmortem examines bodies.
• It finds the cause of death.

Poison Analysis

• This detects toxic substances.
• Used in crime cases.

Photographic Evidence

• Photos record crime scenes.
• They preserve details.

Physical Evidence

• Physical evidence includes objects.
• Collected carefully.

Profile Analysis

• Profiles study suspect behavior.
• Used in investigations.

Pathology Report

• Reports describe medical findings.
• Used in courts.

Polygraph Test

• Polygraphs measure responses.
• Used in questioning.

Pattern Analysis

• Patterns reveal connections.
• Used in crime analysis.

Presumptive Test

• This test gives initial results.
• It needs confirmation.

Post-incident Review

• This reviews case actions.
• It improves processes.

List of Easy Science Words That Start With P

Plant

• Plants grow in soil.
• They make food.

Pen

• Pens write ink.
• They make marks.

Paper

• Paper is a thin material.
• Books use paper.

Pot

• Pots hold plants.
• They contain soil.

Pig

• Pigs are animals.
• They are mammals.

Push

• Push applies force.
• Objects move.

Pull

• Pull draws objects closer.
• It is a force.

Pan

• Pans cook food.
• They use heat.

Pink

• Pink is a color.
• It is light red.

Play

• Play involves activity.
• Animals play.

General Science Words That Begin With P

Process

• Processes involve steps.
• Science studies processes.

Particle

• Particles are small units.
• Matter contains particles.

Pressure

• Pressure applies force.
• It affects states.

Plant

• Plants perform photosynthesis.
• They support life.

Pollution

• Pollution damages ecosystems.
• It must be controlled.

Pattern

• Patterns repeat regularly.
• Science finds patterns.

Population

• Populations include organisms.
• They live together.

Power

• Power measures energy rate.
• Machines use power.

Prediction

• Predictions forecast outcomes.
• Science tests them.

Principle

• Principles explain rules.
• They guide science.

Advanced Science Words Beginning With P

Photosystem

• Photosystems capture light energy.
• They drive photosynthesis.

Pharmacology

• Pharmacology studies drugs.
• It improves medicine.

Paleoclimatology

• This study examines ancient climates.
• It uses evidence.

Proteomics

• Proteomics analyzes proteins.
• Used in biology.

Photolithography

• This creates microcircuits.
• Used in electronics.

Plasma Physics

• This study ionized matter.
• Used in fusion research.

Phylogenetics

• This studies evolutionary relationships.
• It uses genetic data.

Polymerase Chain Reaction

• PCR amplifies DNA.
• Used in labs.

Phase Equilibrium

• This balances phases.
• Used in thermodynamics.

Planetary Science

• This study planets.
• It includes geology.

Rare Science Words That Start With P

Paleosol

• Paleosols are ancient soils.
• They show past climates.

Phyllotaxis

• Phyllotaxis studies leaf arrangement.
• It affects growth.

Prokaryote

• Prokaryotes lack nuclei.
• Bacteria are prokaryotes.

Piezometer

• Piezometers measure water pressure.
• Used in geology.

Planktotroph

• Planktotrophs feed on plankton.
• Seen in marine life.

Parthenogenesis

• This reproduction needs no fertilization.
• Seen in insects.

Pseudopodia

• Pseudopodia help movement.
• Amoebas use them.

Permafrost Thaw

• This melts frozen soil.
• It affects the climate.

Pangenesis

• Pangenesis is an old theory.
• It explained inheritance.

Phototropism

• Phototropism is a plant growth response.
• Plants grow toward light.

More Science Words Starting With the Letter P For Kids

3-Letter Science Words Starting With P

• Psi
• Pro
• Pig

4-Letter Science Words Starting With P

• Pore
• Peak
• Path

5-Letter Science Words Starting With P

• Phase
• Plant
• Probe
• Polar

6-Letter Science Words Starting With P

• Plasma
• Photon
• Pollen
• Planet

7-Letter Science Words Starting With P

• Protein
• Physics
• Primary
• Polymer

8-Letter Science Words Starting With P

• Particle
• Pressure
• Protocol

9-Letter Science Words Starting With P

• Pollution
• Prototype

10-Letter Science Words Starting With P

• Population
• Psychology

Explore more: A complete list of Ten Letter Words

Science Words Starting With P That End With Vowels or Consonants

Science Words Starting With P and Ending With A

• Plasma
• Protista
• Pulmonaria
• Pupilla
• Papilla

Common Science Terms Starting With P and Ending With E

• Phase
• Pore
• Plate
• Particle
• Phosphate

Science Words Starting With P and Ending With I

• Prokaryoti
• Protozoi
• Plasmodi
• Pili
• Plei

Science Words Starting With P and Ending With O

• Photo
• Phyto
• Proto
• Plasto
• Pulmo

Popular Science Words Beginning With P and Ending With U

• Pitu
• Plu
• Panu

Science Words That Begin With P and End With Consonants

• Protein
• Photosynthesis
• Pressure
• Polymer
• Proton
• Plankton
• Pathogen