TEST BANK For Campbell Essential Biology, 7th Edition by Simon & Dickey
What is matter? - ANSWER:anything that has mass and occupies space
What are the three states of matter? - ANSWER:solid, liquid, gas
What are elements? - ANSWER:substances that cannot be broken down into other
substances
How many elements are naturally occurring elements? - ANSWER:92
How many elements are essential to life? - ANSWER:25
How many elements comprise 96% of total human body weight? - ANSWER:4
How many elements comprise the other 4% of total human body weight? -
ANSWER:7
What are the 4 most important elements to life? - ANSWER:Carbon, hydrogen,
nitrogen, oxygen
What are trace elements - ANSWER:Elements necessary for life in small amounts
example of trace element - ANSWER:Iodine (thyroid gland), Fluoride (prevents tooth decay)
What are compounds? - ANSWER:Substances that contain two or more elements
example of compound - ANSWER:NaCl, H2O, DNA
What are atoms? - ANSWER:the smallest unit of matter that still retains the
properties of an element
What are 3 subatomic particles? - ANSWER:Protons, Electrons, Neutrons
What does the atomic number tell you? - ANSWER:the number of protons and
electrons in an element
What does mass measure? - ANSWER:Amount of material in an object
What does atomic mas tell you? - ANSWER:mass of protons and neutrons
What are isotopes? - ANSWER:Different forms of the same element
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