APES 2012 Michelle Hoelzer Ch 2 Quiz by tobydog95

Hint	Answer
Change of a radioisotope to a different isotope by the emission of radioactivity (2 words)
Whenever energy is converted from one form to another in a physical or chemical change, no energy is created nor destroyed; also called the Law of Conservation of Energy (4 words)
Nuclear change where the nuclei of certain isotopes with large mass numbers are split apart into lighter nuclei when struck by a neutron (2 words)
Sum of the number of neutrons and the number of protons in the nucleus of an atom; it gives the approximate mass of that atom (2 words)
Change where there is no change in chemical composition
A measure of acidity
Two or more forms of a chemical element with the same number of protons but different atomic numbers because of different numbers of neutrons
A set of components that function and interact in some regular way
Feedback loop that causes a system to change further in the same direction
From the environment
The idea that all elements are made up of atoms; the most widely accepted scientific theory in chemistry (2 words)
Primarily scientific data, hypotheses, and models that have not been widely tested and accepted; also called Frontier Science (2 words)
The smallest unit of matter into which an element can be divided and still have its characteristic chemical properties
Any process that increase or decrease a change to a system
Matter Quality that is highly concentrated, is usually found near the Earth’s surface, and has great potential for use as a resource
The fundamental structural and functional units of life
To the environment
The total kinetic energy of all moving atoms, ions, or molecules within a given substance
Whenever matter undergoes a physical or chemical change, no atoms are created nor destroyed (5 words)
Feedback loop that causes a system to change in the opposite direction from which it is moving; also called Corrective Feedback Loop
The distance between successive peaks or troughs in the wave
A measure of how useful a form of matter is to humans as a resource, based on its availability and concentration (2 words)
Scientific results or hypotheses that are presented as reliable science without having undergone the rigors of the peer review process (2 words)
Atom or group of atoms with one or more positive (+) or negative (-) electrical charges

Hint	Answer
Solution that has a pH greater than 7
Chemical characteristic that helps determine how a substance dissolved in water (a solution) will interact with and affect its environment; based on amount of hydrogen and hydroxid
A combination of 2 or more atoms of the same or different elements held together by forces called chemical bonds
A measure of the capacity of a type of energy to do useful work (2 words)
Energy associated with motion
A fundamental type of matter that has a unique set of properties and cannot be broken down into simpler substances by chemical means
Energy Quality that is so dispersed that it has little capacity to do useful work
Compound that contains at least 2 carbon atoms combined with atoms of 1 or more other elements
A double helix DNA molecule wrapped around some proteins
Data, hypotheses, models, theories, and laws that are widely accepted by all or most of the scientists who are considered experts in the field under study (2 words)
Interaction of 2 or more factors or processes so that the combined effect is greater than the sum of their spate effects (2 words)
The capacity to do work or transfer heat
The point at which a fundamental shift in the behavior of a system occurs (2 words)
A possible explanation of what scientists observe in nature or in the results of their experiments (2 words)
Nuclear change where 2 nuclei of elements with a low mass number are forced together at extremely high temperatures to form a heavier nucleus (2 words)
A well-tested and widely accepted scientific hypothesis or a group of related hypotheses (2 words)
A well-tested and widely accepted description of what we find happening repeatedly in nature in the same way; also called a Law of Nature (2 words)
Solution that has a pH less than 7; water solution with more hydrogen ions than hydroxide ions
Anything that has mass and takes up space
When energy is changed from one form to another, it always goes from a more useful to a less useful form (4 words)
Combinations of two or more different elements held together in fixed proportions
Process that occurs when an output of matter, energy, or information is fed back into the system as an input and leads to changes in that system (2 words)
Products of partial or complete decomposition of plants and animals made because of exposure to heat and pressure in the Earth’s crust over millions of years (2 words)
Number of protons in the nucleus of an atom (2 words)

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