List of Words for Letter ‘P’
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parallax The
apparent shift in an object’s position when viewed from two locations.
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parallel circuit A circuit with multiple paths along which current electricity can flow.
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passive transport The
movement of molecules through cell membranes without the use of energy by the cell.
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pedigree A
chart that traces the history of traits in a particular family.
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period
One of the primary divisions of a geologic era.
A cycle.
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periodic table A chart that shows the elements in order of increasing atomic number.
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phase of the Moon The shape of the Moon as seen in the night sky.
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phenotype The
way in which a genotype is expressed, or shown, in an organism.
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photosynthesis The process in which plants and some other organisms use sunlight to make food in the form of glucose.
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phylum
A main group within a kingdom, whose members share a main characteristic.
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physical change A change in size, shape, or state, without forming a new substance.
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physical property A property that can be observed without changing the identity of a substance.
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pigments Tiny
solid particles of primary colors, which can be mixed to produce all other colors.
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pioneer community A new community established in a previously lifeless area.
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planet A
molded material which contains carbon and can retain its shape.
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plate tectonics The theory that Earth’s surface is broken into pieces, or plates, that slide over the magma in the mantle.
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pollination The
transfer of pollen from an anther to the stigma.
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pollution A
harmful change in the natural environment.
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population All
the organisms of the same kind that live in a particular area.
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positionThe location of an object compared with things around it.
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potential energy The energy stored in an object or material.
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power The
amount of work done per unit of time.
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precipitation Water that falls from clouds to the ground in the form of rain, sleet, hail, or snow.
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predator A
living thing that hunts and kills other living things for food.
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predict To
state possible results of an event or experiment.
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pressure The
force exerted by a gas.
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primary color One of three colors of light—red, green, or blue—from which all other colors of light can be produced.
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prism A
triangular piece of glass or plastic that bends light.
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producer An
organism that is able to make its own food.
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product The
new substance produced in a chemical reaction.
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protein The
most abundant organic compound in the human body, needed for cell growth and repair and made mainly of carbon, hydrogen, oxygen, and nitrogen.
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proton A
positively charged particle inside an atom’s nucleus.
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pulley A
grooved wheel that turns by the action of a rope in the groove.