things to know
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Anything that occupesa space and has mass. | Matter
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| Solid, liquid, or gas. | Matter exists in one of three states
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| a. Kinetic b. Potential | Energy is the capacity to do work and exists in two forms.
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| The energy of motion. | Kinetic energy is
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| Stored energy. | Potential energy is
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| Energy is easily converted from one form to another. | Energy is easily converted from one form to another.
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| Carbon, hydrogen, oxygen, and nitrogen. | Four elements make up roughly 96% of body weight.
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| Atoms | The smallest particles of an element that retain the characteristics of that element.
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| Elements are designated by a one or two letter abbreviation called the atomic symbol. | Elements are designated by a one or two letter abbreviation called the atomic symbol.
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| Tightly packed protons and neutrons. | Each atom has a central nucleus with.....
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| a. Protons have a positive charge and weigh 1 atomic mass unit (amu) | b. Neutrons do not have a charge and weigh 1 (amu)
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| a. Electrons are found moving around the nucleus, have a negative charge, and are almost weightless. (0amu) | b. Atoms are electrically neutral and the number of electrons is equal to the number of protons
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| Equal to the number of protons of an element. | The atomic number of an element is
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| the atomic number indirectly tells us the number of electrons. | Since the number of protons to the number of electrons
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Created by:
cathyb
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