1) what is a mixture? a) is a such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound. b) substance made by mixing other substances together. c) is a single kind of matter that cannot be separated into other kinds of matter by any physical means. always has a definite and constant composition.  d) It is a particular class of homogeneous matter whose composition is fixed and chemically defined. 2) What is a heterogeneus mixture? a) is a mixture in which the composition is uniform throughout the mixture. b) s one in which different parts (such as salt and water) have been uniformly combined into a new substance (salt water) c) is a mixture where throughout the solution the composition is not uniform d) is a material system made up of two or more different substances which are mixed but are not combined chemically 3) what is a homogeneus mixture? a) he cells can be separated from the plasma by centrifuging, which is a physical change. b) because it contains different elements that are not uniformly mixed. c) is a mixture in which the composition is uniform throughout the mixture. The salt water described above, because the dissolved salt is evenly distributed throughout the entire salt water sample. 4) oil with water is a heterogeneus or homogeneus mixture? a) heterogeneus b) homogeneus 5) name 3 homogeneus mixtures a) Sea water. b) Stones c) Vinegar. d) Air. e) paraffin f) Wood 6) is a egg a mixture? a) true b) false

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