Twig - Molecule

A
- Absolute zero
- Absorption
- Acceleration
- Accuracy
- Acid
- Acid rain
- Activation energy
- Active transport
- Adaptive divergence
- Addiction
- Addition reaction
- Adrenaline
- Aerobic respiration
- Aerosol
- Agar
- Air resistance
- Alcohol
- Algae
- Alkali
- Alkali metal
- Alkaline earth metal
- Allele
- Allotropes
- Alloy
- Alpha particle
- Alternating current
- Altitude
- Alveoli
- Amino acid
- Amniotic fluid
- Amorphous
- Amplification of DNA
- Amplify
- Amplitude
- Amylase
- Anaerobic respiration
- Analogue
- Angiosperm
- Angle of incidence
- Angle of reflection
- Angstrom
- Anhydrous compound
- Anode
- Antagonistic muscles
- Antenna
- Anther
- Antibiotic
- Antibiotic resistance
- Antibody
- Anticyclone
- Antigen
- Antimatter
- Antioxidant
- Aorta
- Apoptosis
- Appendix
- Aqueous
- Aquifer
- Archaea
- Artificial propagation
- Asexual reproduction
- Asteroid
- Astronomy
- Atmosphere
- Atom
- Atomic mass
- Atomic number
- Atomic weight
- ATP
- Aurora
- Autoimmune disease
- Autosomal
- Autotroph
- Auxin
- Avogadro's constant
- Axon
B
- Bacteria
- Baryons
- Basalt
- Base (biology)
- Base (chemistry)
- Beta particles
- Big Bang
- Bile
- Billion
- Biochemistry
- Biodegradable
- Biodiversity
- Biomass
- Biosphere
- Black hole
- Blastocyst
- Blood pressure
- Boiling point
- Boyle's law
- Brittle
- Bronchi
- Bronchiole
- Brownian motion
- Buffer
- Bunsen burner
- Buoyancy
C
- Caldera
- Calibrate
- Carbohydrate
- Carbon dating
- Carbonate
- Carnivore
- Carpel
- Catabolism
- Catalyst
- Cathode
- Cathode ray
- Cell
- Cell cycle
- Cell division
- Cell wall
- Cellulose
- Centre of gravity
- Centripetal force
- Cervix
- Chain reaction
- Chemical bond
- Chemical energy
- Chemical reaction
- Chemical synthesis
- Chemiluminescence
- Chlorofluorocarbons
- Chlorophyll
- Chloroplast
- Cholesterol
- Chordate
- Chromatin
- Chromosome
- Cilia
- Circuit breaker
- Classification
- Climate
- Climatology
- Clone
- Coke
- Combustion
- Comet
- Complete combustion
- Compound
- Compound microscope
- Concave
- Concentration
- Conception
- Condensation reaction
- Condensing
- Conduction
- Consumer
- Continental crust
- Continental Drift
- Control
- Convection
- Convex
- Core (biology)
- Core (Earth sciences)
- Corona
- Correlation
- Corrosion
- Cortisol
- Cosmic dust
- Cosmic rays
- Cosmology
- Coulomb
- Covalent bond
- Cracking
- Crater
- Crude oil
- Crust
- Crystal
- Crystallisation
- Cytoplasm
D
- Dark energy
- Dark matter
- Data
- Decomposition
- Delocalised electrons
- Delta
- Denature
- Denitrification
- Density
- Deoxygenated
- Depression
- Desertification
- Diabetes
- Diatomic
- Diffraction
- Diffusion
- Digestion
- Diode
- Diploid
- Direct current (DC)
- Displacement
- Displacement reaction
- Dissociate
- Dissolve
- Distillation
- Divergence
- DNA
- DNA profile
- DNA replication
- Dominant allele
- Doppler shift
E
- Earth
- Earthquake
- Echo
- Echolocation
- Ecosystem
- Efficiency
- Elastic
- Electric Current
- Electric force
- Electrical charge
- Electrical fuse
- Electrical resistance
- Electrode
- Electrolysis
- Electrolyte
- Electrolytic cell
- Electromagnetic induction
- Electromagnetic radiation
- Electromagnetic spectrum
- Electron
- Electron shell
- Electroplating
- Electrostatic attraction
- Element
- Elliptical orbit
- Embryo
- Emission
- Empirical formula
- Emulsion
- Endangered
- Endocytosis
- Endothermic
- Energy
- Energy level
- Energy resources
- Enthalpy change
- E-Number
- Enzyme
- Epicentre
- Epidemiology
- Equilibrium
- Erosion
- Eukaryote
- Eutrophication
- Evaporation
- Evolution
- Exothermic
- Extinction
- Extraction
- Extrusion
F
- Fahrenheit (°F)
- Fatty acid
- Fermentation
- Fertilisation
- Filtration
- Flammable
- Floodplain
- Fluid
- Fluorescent
- Focus
- Foetus
- Food chain
- Force
- Forensic science
- Formulae
- Fossil
- Fossil fuels
- Frequency
- Functional group
- Fusion
G
- Galaxy
- Gamete
- Gamma ray
- Gamma ray bursts
- Gas
- Gene
- Genetic engineering
- Genotype
- Genus
- Germination
- Giant covalent structure
- Glacial period
- Gland
- Glucose
- Gravitational field
- Gravity
- Greenhouse effect
- Greenhouse gas
- Groundwater
H
- Haemoglobin
- Hale-Bopp
- Half-life
- Halley
- Haploid
- Harmonics
- Heat
- Heat resistant
- Herbivore
- Hertz (Hz)
- Heterogeneous mixture
- Homeostasis
- Homogeneous mixture
- Hormones
- Hot spot
- Hybridisation
- Hydrated compound
- Hydrocarbons
- Hydrophilic
- Hydrophobic
- Hydroxide
- Hyperventilating
- Hypothalamus
- Hypothesis
I
- Igneous rock
- Indicator
- Indicator species
- Inert
- Infectious
- Infrared light
- Infrasound
- Inherited
- Insoluble
- Insulator
- Interdependence of living things
- Interference
- Interglacial period
- Intermolecular force
- Invertebrate
- Involuntary
- Ion
- Ionic bond
- Ionic compound
- Ionisation
- Irritant
- Isomers
- Isotope
- Isotopic mass
K
- Kilohertz
- Kinetic energy
L
- Laser
- Lattice
- Launch window
- Leaching
- Lens
- Light year (ly)
- Lightning
- Limestone
- Line spectra
- Linnaean hierarchy
- Lipids
- Liquid
- Lithosphere
- Longitudinal wave
- Long-period events
- Luminance
- Lunar Eclipse
- Lymphocyte
M
- Magma
- Magnetic field
- Magnetic force
- Magnify
- Mantle
- Mass
- Mass spectrometer
- Matter
- Mean
- Mechanical wave
- Median
- Medium
- Meiosis
- Melting point
- Mesosphere
- Metabolism
- Metal
- Metallic bond
- Metalloid
- Metamorphic rock
- Metamorphism
- Meteor
- Meteor shower
- Meteorite
- Methane
- Microorganism
- Microwave
- Migration
- Milky Way
- Millibar (mb)
- Mineral (biology)
- Mineral (chemistry)
- Mitosis
- Modulation
- Molecular formula
- Molecular mass
- Molecular weight
- Molecule
- Molten
- Monomer
- Moon
- Motion
- Motor effect
- Multicellular
- Mutation
- Myoglobin
N
- Nanomaterial
- Nanometre
- Nanotechnology
- Nebula
- Negative charge
- Nephrons
- Neutral
- Neutralisation
- Neutron
- Neutron star
- Niche
- Noble gases
- Non-flammable
- Non-metals
- Normal
- Nova
- Nuclear
- Nuclear fission
- Nuclear fusion
- Nucleation
- Nucleic acid
- Nucleosynthesis
- Nucleus (biology)
- Nucleus (chemistry)
- Nutritional value
O
- Observer
- Oceanic crust
- Octave
- Omega-3
- Omnivore
- Ore
- Organ
- Organic chemistry
- Organic molecule
- Organism
- Oscillate
- Osmosis
- Osteocyte
- Ovule
- Ovum
- Oxidation
- Oxide
- Oxidiser
- Oxygenated
- Ozone layer
P
- Pangaea
- Particle(s)
- Peer review
- Peptide
- Percentage yield
- Periodic table
- Peristalsis
- pH
- Phagocyte
- Phenotype
- Phloem
- Phospholipid
- Photochemical reaction
- Photon
- Photosynthesis
- Pigment
- Pitch
- Planet
- Planetary nebula
- Plasma (biology)
- Plasma (physics)
- Plate boundary
- Polarisation
- Polarity
- Pole
- Pollen
- Pollination
- Polymer
- Polyunsaturated
- Positive charge
- Potash
- Potential energy
- Power
- Precipitate
- Precision
- Predator
- Pregnancy
- Preservative
- Pressure
- Prey
- Primeval soup
- Prism
- Product
- Prokaryote
- Propulsion
- Protein
- Proton
- Pure
- P-wave
- Pyramid of numbers
- Pyroclastic flows
Q
- Quantum
- Quark
R
- Radiation
- Radio waves
- Radioactivity
- Rate of reaction
- Reactant
- Reaction
- Reactivity
- Receiver
- Receptor
- Recessive allele
- Recombination
- Red giant
- Redox reaction
- Reducing agent
- Reduction
- Reflection
- Reflex arc
- Refraction
- Refractive index
- Renewable energy
- Resolution
- Resonance
- Resonant frequency
- Respiration
- Reversible reaction
- Ribosomes
- RNA
- Robot
- Rotation
S
- Salt
- Sampling
- Satellite
- Saturated fats
- Saturated solutions
- Saturn's rings
- Scalar
- Seafloor spreading
- Sediment
- Sedimentary rock
- Seismic waves
- Semiconductor
- Sensory
- Shockwaves
- SI
- Smog
- Solar cell
- Solar Eclipse
- Solar flare
- Solar storm
- Solar System
- Solar wind
- Solid
- Soluble
- Solute
- Solution
- Solvent
- Sonic boom
- Source
- Spacecraft
- Species
- Spectrometer
- Spectroscopy
- Spectrum
- Sperm
- Spontaneous
- Spontaneous emission
- Stable
- Stamen
- Star
- Starch
- Static electricity
- Stationary
- Stem cells
- Stimulated emission
- Stratosphere
- Strong acid
- Strong material
- Strong nuclear force
- Subatomic particles
- Subduction
- Sublimation
- Substance
- Substitution reaction
- Substrate
- Sun
- Sunspot
- Superconductivity
- Supernova
- Supersonic
- Surface tension
- Sustainable
- S-wave
- Symbiosis
- Symptom
- Synthetic
T
- Taxonomy
- Telescope
- Temperate zones
- Temperature
- Tension
- Terrestrial planets
- Theory
- Thermal
- Thermal decomposition
- Tissue
- Topsoil
- Total internal reflection
- Toxic
- Transducer
- Transform boundary
- Transformer
- Transition element
- Transmitter
- Transparent
- Transpiration
- Transverse wave
- Trench
- Trophic level
- Tropism
- Troposphere
U
- Ultrasound
- Ultraviolet light
- Universe
- Unsaturated fats
- Urea
- Uterus
V
- Vaccine
- Vacuole
- Vacuum
- Van der Waals Force
- Vaporise
- Variable
- Vector
- Velocity
- Vertebrate
- Vesicle
- Villi
- Virus
- Viscosity
- Visible light
- Vitamin
- Volatile
- Volt (V)
- Volume
W
- Water table
- Watt (W)
- Wavelength
- Weather
- Weathering
- Weight
- White dwarf
- Work
- Wormhole
X
- Xerophyte
- X-ray
- Xylem
Z
- Zygote

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Two or more atoms held strongly together by covalent bonds.

Two or more atoms held strongly together by covalent bonds. Molecules can contain atoms of a single element, such as oxygen molecules which consist of a pair of oxygen atoms. Or they can contain atoms of different elements: from water molecules, H₂O, to huge, complex organic compounds, such as DNA.

Molecules can contain atoms of a single element, such as oxygen molecules which consist of a pair of oxygen atoms. Or they can contain atoms of different elements: from water molecules, H₂O, to huge, complex organic compounds, such as DNA.

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Science glossary film: Molecule

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