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Science
NAL
147
Other
8th Grade
10/05/2014

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Term
Atmosphere
Definition
A layer of gases surrounding a planet that is held in place by gravity.
Term
Minerals: Quartz
Definition
the second most abundant mineral in the Earth's continental crust
Some are semi-precious gemstones, used in jewelry making.
Term
Minerals: Talc
Definition
Widely used substance known as talcum powder. Occurs in fibrous masses, and in rarely crystal form.It is the softest known mineral and listed as 1 on the Mohs hardness scale as such.
Term
Minerals: Calcite
Definition
carbonate mineral and the most stable polymorph of calcium carbonate.
It has a defining Mohs hardness of 3.
Term
Rock Types and Layers: Quartzite
Definition
A hard, non-foliated metamorphic rock which was originally pure quartz sandstone
Term
Rock Types and Layers: Marble
Definition
Non-foliated metamorphic rock composed of recrystallized carbonate minerals, most commonly calcite or dolomite. Commonly used for sculpture and as a building material
Term
Rock Types and Layers: Gneiss
Definition
Common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. It is often foliated (composed of layers of sheet-like planar structures). The foliations are characterized by alternating darker and lighter colored bands, called "gneissic banding".
Term
Rock Types and Layers: Slate
Definition
fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. Used in roofing tiles and chalkboards.
Term
Rock Types and Layers: Schist
Definition
medium-grade metamorphic rock[1] with medium to large, flat, sheet-like grains in a preferred orientation (nearby grains are roughly parallel
Term
Rock Types and Layers: Phyllite
Definition
a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation
Term
Rock Types and Layers: Sedimentary
Definition
types of rock that are formed by the deposition of material at the Earth's surface and within bodies of water
Term
Rock Types and Layers: Serpentine
Definition
a dark green mineral consisting of hydrated magnesium silicate, sometimes mottled or spotted like a snake's skin
Term
Rock Types and Layers: Shale
Definition
a fine-grained, clastic sedimentary rock composed of mud that is a mix of flakes of clay minerals and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.
Term
Rock Types and Layers: Limestone
Definition
A sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate (CaCO3). Most is composed of skeletal fragments of marine organisms such as coral or foraminifera.
Term
Rock Types and Layers: Granite
Definition
A common type of felsic intrusive igneous rock which is granular and phaneritic in texture
Term
Weather: Troposphere
Definition
The lowest portion of Earth's atmosphere. It contains approximately 80% of the atmosphere's mass and 99% of its water vapour and aerosols
Term
Weather: Seasons
Definition
A division of the year, marked by changes in weather, ecology, and hours of daylight. They result from the yearly orbit of the Earth around the Sun and the tilt of the Earth's rotational axis relative to the plane of the orbit
Term
Weather: Dew Point
Definition
The temperature at which the water vapor in a sample of air at constant barometric pressure condenses into liquid water at the same rate at which it evaporates.
Term
Weather: Barometric Pressure
Definition
The force per unit area exerted on a surface by the weight of air above that surface in the atmosphere of Earth (or that of another planet).
Term
Weather: Relative Humidity
Definition
The ratio of the partial pressure of water vapor to the equilibrium vapor pressure of water at the same temperature. Humans are sensitive to humidity because the human body uses evaporative cooling, enabled by perspiration, as the primary mechanism to rid itself of waste heat. Perspiration evaporates from the skin more slowly under humid conditions than under arid conditions.
Term
Weather: Condensation
Definition
The change of the physical state of matter from gas phase into liquid phase, and is the reverse of vaporization.
Term
Weather: Tsunami
Definition
Known as a seismic sea wave, is a series of water waves caused by the displacement of a large volume of a body of water, generally an ocean or a large lake. Caused by: Earthquakes, volcanic eruptions and other underwater explosions (including detonations of underwater nuclear devices), landslides, glacier calvings, meteorite impacts, etc.
Term
Weather: Weather Prediction
Definition
The application of science and technology to predict the state of the atmosphere for a given location
Term
Weather: Fold Mountains
Definition
mountains that form mainly by the effects of folding on layers within the upper part of the Earth's crust
Term
Weather: Refracting
Definition
(to break up, like a bone fracture) When the sunlight breaks into prisms of color after rain- forming a rainbow
Term
Weather: Aurora Borealis
Definition
(Northern Lights) occur when highly charged electrons from the solar wind interact with elements in the earth's atmosphere
Term
Weather: Jetstream
Definition
are fast flowing, narrow air currents found in the atmospheres of some planets, including Earth
Term
Weather: Monsoon
Definition
traditionally defined as a seasonal reversing wind accompanied by corresponding changes in precipitation, also describes seasonal changes in atmospheric circulation and precipitation associated with the asymmetric heating of land and sea
Term
Terms: Greenhouse Effect
Definition
a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse gases, and is re-radiated in all directions
Term
Terms: Minerals
Definition
A naturally occurring substance that is solid and inorganic representable by a chemical formula, and has an ordered atomic structure. It is different from a rock.
Term
Terms: Atmospheric Oxygen
Definition
Geologists trace the rise of atmospheric oxygen by looking for oxidation products in ancient rock formations
Term
Terms: El Chichon
Definition
is an active volcano in Francisco León, north-western Chiapas, Mexico, lest eruption in 1982
Term
Terms: Sangay
Definition
an active stratovolcano in central Ecuador. It is the most active volcano in Ecuador, having erupted three times in recorded history
Term
Terms: Nuclear Fusion
Definition
a nuclear reaction in which two or more atomic nuclei collide at a very high speed and join to form a new type of atomic nucleus. During this process, matter is not conserved because some of the matter of the fusing nuclei is converted to photons (energy)
Term
Terms: Rainbows
Definition
an optical and meteorological phenomenon that is caused by both reflection and refraction of light in water droplets resulting in a spectrum of light appearing in the sky. It takes the form of a multicoloured arc. Rainbows caused by sunlight always appear in the section of sky directly opposite the sun
Term
Terms: Ionosphere
Definition
The region of the upper atmosphere, from about 53 mi to 370 mi altitude, and includes the thermosphere and parts of the mesosphere and exosphere. It is distinguished because it is ionized by solar radiation
Term
Terms: Nitrogen
Definition
a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a colorless and odorless diatomic gas. It is a common element in the universe, estimated at about seventh in total abundance in our galaxy and the Solar System
Term
Terms: Meander
Definition
is a bend in a sinuous watercourse or river. It forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt
Term
Terms: Pangaea
Definition
A scientific theory that a supercontinent existed during the late Paleozoic and early Mesozoic eras. It formed approximately 300 million years ago and then began to break apart after about 100 million years
Term
Terms: Teutonic Plate Boundaries
Definition
A massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. Plate size can vary greatly, from a few hundred to thousands of kilometers across; the Pacific and Antarctic Plates are among the largest. Plate thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere
Term
Terms: Dam
Definition
a barrier that impounds water or underground streams
Term
Terms: Solstice
Definition
is an astronomical event that occurs twice each year as the Sun reaches its highest or lowest excursion relative to the celestial equator on the celestial sphere. The solstices, together with the equinoxes, are connected with the seasons
Term
Terms: Conic Map Projection
Definition
a systematic transformation of the latitudes and longitudes of locations on the surface of a sphere or an ellipsoid into locations on a plane
Term
Measurement: Volume
Definition
the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains
Term
Measurement: Pounds
Definition
is a unit of mass used in the imperial, United States customary
Term
Measurement: Tons
Definition
a unit of mass, and as a unit of volume. It can also be used as a measure of energy, for truck classification

In the United States and formerly Canada a ton is defined to be 2,000 pounds
Term
Measurement: Metric Measurements
Definition
The metric system is a system of measuring. It has three main units:

m the meter for length
kg the kilogram for mass
s the second for time
Term
People: Archimedes
Definition
An Ancient Greek mathematician, physicist, engineer, inventor, and astronomer.
-laws of levers and pulleys
-the center of gravity.
-calculated pi
-proved the formulas for the volume and surface area of a sphere
-showed how exponents could be used to write bigger numbers
Term
People: Isaac Newton
Definition
an English physicist and mathematician (described in his own day as a "natural philosopher") who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution,formulated the laws of motion and universal gravitation
Term
People: Agustin-Jean Fresnel
Definition
was a French engineer and physicist who contributed significantly to the establishment of the theory of wave optics
Term
People: Jacques Cousteau
Definition
a French naval officer, explorer, conservationist, filmmaker, innovator, scientist, photographer, author and researcher who studied the sea and all forms of life in water
Term
Scientific Fields: Entomology
Definition
the scientific study of insects, a branch of arthropodology
Term
Scientific Fields: Geology
Definition
the science comprising the study of solid Earth, the rocks of which it is composed, and the processes by which they change
Term
Scientific Fields: Meteorology
Definition
scientific study of the atmosphere
Term
Scientific Fields: Agronomy
Definition
the science and technology of producing and using plants for food, fuel, fibre, and land reclamation
Term
Scientific Fields: Audiology
Definition
a branch of science that studies hearing, balance, and related disorders
Term
Scientific Method Terms: Conduction
Definition
The transfer of energy, such as heat or an electric charge, through a substance
Term
Scientific Method Terms: Duodecimal System
Definition
known as base-12 or dozenal, is a positional notation numeral system using twelve as its base
Term
Scientific Method Terms: Fathom
Definition
unit of length equal to six feet
Term
Scientific Method Terms: Acid, Base, Neutral
Definition
The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.
Term
Scientific Method Terms: Convex Lenses
Definition
curved or bowed outward like the outside of a bowl or sphere or circle
Term
Scientific Method Terms: Fiber Optics
Definition
A technology that uses glass (or plastic) threads (fibers) to transmit data. A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves.
Term
Scientific Method Terms: Endothermic
Definition
a process or reaction in which the system absorbs energy from its surroundings in the form of heat
Term
Scientific Method Terms: Acceleration
Definition
is the rate at which the velocity of an object changes over time. An object's acceleration is the net result of any and all forces acting on the object, as described by Newton's Second Law. For example, when a car starts from a standstill (zero relative velocity) and travels in a straight line at increasing speeds, it is accelerating in the direction of travel. If the car turns there is an acceleration toward the new direction.
Term
Scientific Method Terms: Gears
Definition
a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque, in most cases with teeth on the one gear being of identical shape, and often also with that shape on the other gear
Term
Scientific Method Terms: Compound Machines
Definition
combinations of two or more elements
Term
Scientific Method Terms: Food Allergies
Definition
an exaggerated immune response triggered by eggs, peanuts, milk, or some other specific food
Term
Animals: Bivalve Mollusk
Definition
breathe through their gills. As filter feeders, bivalves gather food through their gills
Term
Animals: Open Circulatory System
Definition
a system in which a fluid in a cavity called the hemocoel bathes the organs directly with oxygen and nutrients and there is no distinction between blood and interstitial fluid
Term
Animals: Closed Circulatory System
Definition
meaning that the blood never leaves the network of blood vessels. In contrast, oxygen and nutrients diffuse across the blood vessel layers and enter interstitial fluid, which carries oxygen and nutrients to the target cells, and carbon dioxide and wastes in the opposite direction
Term
Animals: Reptilia Class
Definition
are an evolutionary grade of animals, comprising today's turtles, crocodilians, snakes, lizards, and tuatara, as well as many extinct groups.
Term
Cells: Classification
Definition
the process in which ideas and objects are recognized, differentiated, and understood
Term
Cells: Nuclear Pores
Definition
Openings through the nuclear envelope, allow for passage of materials between nucleus and cytoplasm
Term
Cells: Ribosome
Definition
tiny particle that is present in large numbers in all living cells and serves as the site of protein synthesis
Term
Cells: Lysosomes
Definition
derived from the Greek words lysis, meaning "to loosen", and soma, "body"

is a membrane-bound cell organelle found in animal cells (they are absent in red blood cells
Term
Humans: Nervous System
Definition
the part of an animal's body that coordinates its voluntary and involuntary actions and transmits signals between different parts of its body
Term
Humans: Organ Transplants
Definition
moving of an organ from one body to another or from a donor site to another location on the patient's own body, for the purpose of replacing the recipient's damaged or absent organ
Term
Humans: Organic Compounds
Definition
is any member of a large class of gaseous, liquid, or solid chemical compounds whose molecules contain carbon
Term
Humans: Gall Bladder
Definition
is a small organ where bile is stored, before it is released into the small intestine
Term
Humans: Ear Bones
Definition
anvil - (also called the incus) a tiny bone that passes vibrations from the hammer to the stirrup.
stirrup - (also called the stapes) a tiny, U-shaped bone that passes vibrations from the stirrup to the cochlea. This is the smallest bone in the human body

hammer - (also called the malleus) a tiny bone that passes vibrations from the eardrum to the anvil.
Term
Humans: Thyroxin(e)
Definition
An iodine-containing hormone secreted by the thyroid gland that increases the rate of cell metabolism and regulates growth. can also be made synthetically for treatment of hypothyroidism
Term
Humans: Insulin
Definition
a peptide hormone produced by beta cells in the pancreas. It regulates the metabolism of carbohydrates and fats by promoting the absorption of glucose from the blood to skeletal muscles and fat tissue and by causing fat to be stored rather than used for energy
Term
Humans: Growth Hormone
Definition
also known as somatotropin or somatropin, is a peptide hormone that stimulates growth, cell reproduction and regeneration in humans and other animals.
Term
Humans: Pharynx
Definition
the part inside your mouth where the passages of the nose connect to your mouth and throat
Term
Humans: Larynx
Definition
the part of your throat that contains the vocal cords
Term
Humans: Trachea
Definition
a long tube in your neck and chest that carries air into and out of your lungs
Term
Humans: Alveoli
Definition
a small air-containing compartment of the lungs in which the bronchioles terminate and from which respiratory gases are exchanged with the pulmonary capillaries
Term
Humans: Adrenaline
Definition
a substance that is released in the body of a person who is feeling a strong emotion (such as excitement, fear, or anger) and that causes the heart to beat faster
Term
Humans: Parathormone
Definition
hormone that is made by the parathyroid glands and is critical to maintaining calcium and phosphorus balance
Term
Humans: Kidney Parts
Definition
Renal capsule - a thin, outer membrane that helps protect the kidney
•Cortex - lightly colored outer region
•Medulla - a darker, reddish-brown, inner region
•Renal pelvis - a flat funnel-shaped cavity that collects the urine into the ureters
Term
Humans: Lymphatic System
Definition
is part of the circulatory system, comprising a network of lymphatic vessels that carry a clear fluid called lymph (from Latin lympha meaning water)) directionally towards the heart
Term
Humans: Air Passing to Lungs
Definition
Air that we breathe enters the nose, flows through the pharynx (throat) and larynx (voice box) and enters the trachea (windpipe). The trachea eventually divides into two parts called bronchi. The right main bronchus supplies the right lung; the left main bronchus supplies the left lung. These bronchi then go on to divide into smaller bronchi and eventually, the bronchi become known as bronchioles – the smallest air tubes in the lungs.
Term
Humans: Tongue Receptors
Definition
facilitates the sensation of taste
Type 1, sweet
Type 2, bitter
Term
Plants: Deciduous
Definition
of a tree or shrub shedding its leaves annually
Term
Plants: Endosperm
Definition
the tissue produced inside the seeds of most flowering plants around the time of fertilization. It surrounds the embryo and provides nutrition in the form of starch, though it can also contain oils and protein.
Term
Plants: Major Vegetative Parts
Definition
include leaves, roots, leaf buds, and stems
Term
Plants: Photosynthesis
Definition
a process used by plants and other organisms to convert light energy, normally from the Sun, into chemical energy that can be later released to fuel the organisms' activities
Term
Plants: Monocots/Dicots
Definition
MONOCOTS Embryo with single cotyledon, Pollen with single furrow or pore DICOTS Embryo with two cotyledons, Pollen with three furrows or pores
Term
People: Schleiden and Schwann
Definition
Co-founded cell theory, which explains the properties of cells
Term
Terms: Bivalve
Definition
any of more than 15,000 species of clams, oysters, mussels, scallops, and other members of the phylum Mollusca characterized by a shell that is divided from front to back into left and right valves
Term
Terms: Endangered Species
Definition
one which has been categorized by the International Union for Conservation of Nature (IUCN) as likely to become extinct, 3079 animals and 2655 plants are endangered worldwide
Term
Terms: Insertion
Definition
the addition of DNA into a genetic sequence
Term
Terms: Tentacles
Definition
a flexible, mobile, elongated organ present in some species of animals, most of them invertebrates
Term
Terms: Natural Selection
Definition
the gradual process by which biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment. It is a key mechanism of evolution.
Term
Terms: Feral
Definition
an animal living in the wild but descended from domesticated individuals
Term
Terms: Leeches
Definition
predominantly blood suckers that feed on blood from vertebrate and invertebrate animals, most live in freshwater
Term
Terms: Dehydration Synthesis
Definition
To bond two molecules together while removing water.
Term
Terms: Puberty
Definition
the process of physical changes by which a child's body matures into an adult body
Term
Atomic Number: Carbon
Definition
6
Term
Atomic Number: Oxygen
Definition
8
Term
Atomic Number: Lithium
Definition
3
Term
Atomic Number: Nitrogen
Definition
7
Term
Atomic Number: Helium
Definition
2
Term
Energy: Chemical
Definition
any change that results in the formation of new chemical substances, iron rusting (iron oxide forms)
Term
Energy: Physical
Definition
rearranges molecules but doesn't affect their internal structures, •whipping egg whites (air is forced into the fluid, but no new substance is produced)
Term
Periodic Table: Antimony
Definition
a chemical element with symbol Sb (from Latin: stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite
Term
Periodic Table: Left Side
Definition
Metals- generally solid at room temp., good conductors, shiny, malleable, ductile
Term
Periodic Table: Lead
Definition
a chemical element in the carbon group with symbol Pb and atomic number 82. Lead is a soft and malleable heavy and post-transition metal
Term
Solar System: Jovian
Definition
gas giant planets- Jupiter, Saturn, Uranus and Neptune
Term
Solar System: Saturn
Definition
sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. gas giant
Term
Solar System: Uranus
Definition
seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System. Similar in composition to Neptune. gas giant
Term
Solar System: Neptune
Definition
the eighth and farthest planet from the Sun in the Solar System. It is the fourth-largest planet by diameter and the third-largest by mass. Among the gaseous planets in the Solar System, Neptune is the most dense, gas giant
Term
Solar System: Jupiter
Definition
fifth planet from the Sun and the largest planet in the Solar System. It is a gas giant with mass one-thousandth of that of the Sun but is two and a half times the mass of all the other planets in the Solar System combined. Jupiter is classified as a gas giant
Term
Solar System: Red Star Shift
Definition
A star or galaxy moving away from us will look more red than it should
Term
Solar System: Blue Star Shift
Definition
An object, like a star or a galaxy that is far away and moving toward us, will look more blue than it normally does.
Term
Solar System: Maxwell Gap
Definition
A region within Saturn's rings. Named after the founder.
Term
Solar System: Atmospheres: Venus
Definition
the densest atmosphere of the four terrestrial planets, consisting of more than 96% carbon dioxide
Term
Solar System: Atmospheres: Earth
Definition
It is 78% nitrogen and 21% oxygen, with trace amounts of water vapor, carbon dioxide and other gaseous molecules
Term
Solar System: Atmospheres: Mars
Definition
consists of about 96% carbon dioxide, 1.93% argon and 1.89% nitrogen along with traces of oxygen and water
Term
Solar System: Atmospheres: Jupiter
Definition
has the largest planetary atmosphere in the Solar System, spanning over (3,107 mi) in altitude. As Jupiter has no surface, the base of its atmosphere is usually considered to be the point at which atmospheric pressure is equal to 1 MPa (10 bar), or ten times surface pressure on Earth
Term
Solar System: Atmospheres: Saturn
Definition
The outer atmosphere of contains 96.3% molecular hydrogen and 3.25% helium. Trace amounts of ammonia, acetylene, ethane, propane, phosphine and methane have been detected.
Term
Solar System: Olympus Mons
Definition
a large shield volcano on the planet Mars. By one measure, it has a height of nearly 22 km. Olympus Mons stands almost three times as tall as Mount Everest's height above sea level
Term
Solar System: White Dwarf
Definition
a stellar remnant composed mostly of electron-degenerate matter. They are very dense; a white dwarf's mass is comparable to that of the Sun, and its volume is comparable to that of the Earth
Term
Solar System: Meteoroid/Meteorite/Meteor
Definition
A meteor is the flash of light that we see in the night sky when a small chunk of interplanetary debris burns up as it passes through our atmosphere.
The debris is called a meteoroid. If any part of a meteoroid survives the fall through the atmosphere and lands on Earth, it is called a meteorite
Term
Terms: Element
Definition
a pure substance consisting of one type of atom, they are divided into metals, metalloids, and nonmetals. (Periodic Table)
Term
Terms: Mixture
Definition
a material system made up of two or more different substances which are mixed but are not combined chemically. They are mixed in the form of solutions, suspensions, and colloids.
Term
Terms: Nobel Gases
Definition
make a group of chemical elements with similar properties: under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity
Term
Terms: Adhesion
Definition
the tendency of dissimilar particles or surfaces to cling to one another
Term
Terms: Convection Currents
Definition
Occur within:

• the geosphere – plate tectonics
•the atmosphere - wind
•the hydrosphere - ocean currents
Term
Terms: Light Year
Definition
unit of distance. It is the distance that light can travel in one year.
1 light year = 9.4605284 × 1015 meters
Term
Terms: Ammeter
Definition
a measuring instrument used to measure the electric current in a circuit
Term
Terms: Corundum
Definition
a crystalline form of aluminium oxide
with traces of iron, titanium and chromium. It is a rock-forming mineral
Term
Terms: Radio Waves
Definition
type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths ranging from 1 millimeter (0.039 in) to 100 kilometers (62 mi). Like all other electromagnetic waves, they travel at the speed of light.
Term
Terms: X-Rays
Definition
is a form of electromagnetic radiation. Most X-rays have a wavelength in the range of 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. X-ray wavelengths are shorter than those of UV rays and typically longer than those of gamma rays
Term
Terms: Absolute Zero
Definition
the lower limit of the thermodynamic temperature scale, a state at which the enthalpy and entropy of a cooled ideal gas reaches its minimum value, taken as 0.
Term
Terms: pH Scale
Definition
measures how acidic or basic a substance is. It ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic.
Term
Terms: Compound
Definition
A pure chemical substance consisting of two or more different chemical elements that can be separated into simpler substances by chemical reactions. 2 atoms of hydrogen + 1 atom of oxygen becomes 1 molecule of compound-water
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