Clontz 3

Front 1

natural

Back 1

Existing in, or produced by nature

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natural selection

Back 2

The principle that in a given environment individuals having characteristics that aid survival will produce more offspring, and the proportion of individuals
having such characteristics will increase with each succeeding generation.

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nesting

Back 3

To build or occupy a nest; settle in

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neutral

Back 4

Neither acidic nor basic (as in pH)

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neutrons

Back 5

An uncharged elementary particle that has a mass nearly equal to that of the
proton and is present in atomic nuclei

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nuclear

Back 6

Used in or produced by a nuclear reaction; referring to particles or properties of
an atomic nucleus

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nuclear reaction

Back 7

A change in the identity or characteristics of an atomic nucleus that results when
it is bombarded with an energetic particle

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nucleus

Back 8

1. The positively charged central portion of an atom that comprises nearly all of
the atomic mass and that consists of protons and neutrons. 2. The portion of a
eukoryotic cell that is surrounded by a nuclear membrane and contains DNA

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nutrient

Back 9

A nutritive substance or ingredient

Front 10

observe

Back 10

To watch carefully, especially with attention to details or behavior for the
purpose of arriving at a judgment

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ocean trench

Back 11

A long, narrow, deep depression in the ocean bed.

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omnivore

Back 12

An animal that feeds on both animal and vegetable substances

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orbit

Back 13

A path described by one body in its revolution about another (as by the Earth
about the sun or by an electron about an atomic nucleus).

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organ

Back 14

A differentiated structure (such as a heart, kidney, leaf or stem) consisting of cells
and tissues, and performing some specific function in an organism.

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organ systems

Back 15

Organs working together for a specific function.

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organic

Back 16

Compounds containing carbon and chiefly or ultimately of biological origin.

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organism

Back 17

An individual constituted to carry on the activities of life by means of organs
separate in function but mutually dependent; a living being

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oxidation

Back 18

Combination of a substance with oxygen

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oxidize

Back 19

To combine with oxygen

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parasite

Back 20

An organism living in, with or on another organism in which a parasite obtains
benefits from a host that it usually injures.

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particle

Back 21

Any of the basic units of matter and energy (such as a molecule, atom, proton,
electron or photon

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pattern

Back 22

reliable sample of traits, acts, tendencies or other observable characteristics

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periodic table

Back 23

An arrangement of chemical elements based on the periodic law.

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pH scale

Back 24

A numerical measure of the acidity or alkalinity of a chemical solution

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phenomenon

Back 25

A fact or event of scientific interest susceptible to scientific description and
explanation.

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photosynthesis

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The chemical process by which chlorophyll-containing plants use light to convert carbon dioxide and water into carbohydrates, releasing oxygen as a byproduct

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physical change

Back 27

A property of a material that can be observed without changing the chemical
makeup of the material

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physiology

Back 28

The biological science of essential and characteristic life processes, activities and
functions.

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pitch

Back 29

The property of a sound, especially a musical tone, that is determined by the
frequency of the waves producing it; highness or lowness of sound

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planet

Back 30

Any of the large bodies that revolve around the sun in the solar system

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pollution

Back 31

A substance that, when added to the environment causes the environment to be
harmful or unfit for living things.

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population

Back 32

All the plants or animals of the same kind found in a given area

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potential energy

Back 33

The energy that matter has because of its position or because of the arrangement
of atoms or parts.

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precipitation

Back 34

deposit on Earth of hail, mist, rain, sleet or snow

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predator

Back 35

An animal that lives by capturing prey as a means of maintaining life

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prey

Back 36

An animal taken by a predator as food

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producer

Back 37

Any of various organisms (such as a green plant) which produce their own
organic compounds from simple precursors (such as carbon dioxide and
inorganic nitrogen) and many of which are food sources for other organisms.

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prokaryotic

Back 38

A cellular organism (such as a bacterium or a blue-green alga) that does not have
a distinct nucleus

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property

Back 39

A quality or trait belonging to an individual or thing

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proton

Back 40

A stable subatomic particle occurring in all atomic nuclei with a positive electric
charge equal in magnitude to that of an electron.

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qualitative

Back 41

Involving quality or kind

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quantitative

Back 42

Involving the measurement of quantity or amount.