A TV screen looked at from a distance appears as a smooth continuous flow of images Up close however we see this is an illusion What really exists are a series of tiny dots pixels This is similar to a chemist s view of matter in that Is chemistry the study of the submicroscopic the microscopic or the macroscopic 1 Submicroscopic because it deals with atoms and molecules which can t be seen with a microscope 2 Microscopic because it pertains to the formation of crystals 3 Macroscopic because it deals with powders liquids and gases that fill beakers and flasks 4 All of these answers because most everything is made of atoms and molecules 68 29 2 1 0 2 3 4 1 2 3 3 3 4 What type of phase change does the following figure best describe Physical or chemical change 1 Chemical because the atoms 53 are connected differently 2 Chemical because of the formation of elements 3 None of these choices 4 Physical because of a change in phase 5 Physical because a new material has been formed 1 2 3 4 5 Condensation Evaporation Freezing Melting Sublimation 1 The sample is being cooled and the material is condensing 2 The sample is being cooled and the material is freezing 3 The sample is being heated and the material is boiling 4 The sample is being heated and the material is melting 5 The sample is unchanged 88 10 3 1 2 0 0 4 5 3 The phase in which atoms and molecules no longer move is the 1 2 3 4 5 64 gas phase liquid phase plasma phase solid phase none of these choices 45 45 25 13 8 21 15 3 0 1 2 3 4 5 Air Chlorine from the water Hydrogen Oxygen Water vapor 3 68 3 5 0 1 2 3 4 1 Chemical 2 Physical 1 5 This change is chemical or physical water begins to boil What is the gas found within a bubble of boiling water 1 2 3 4 5 90 1 the fundamental particles of matter can also be seen when looked at closely with a magnifying glass 2 on the submicroscopic level chemists find that matter is made of extremely small particles such as atoms and molecules 3 anything that a chemist can see touch hear smell or taste is an illusion 4 elements are made up of only three basic types of matter 5 What is happening 2 3 4 5 This change is chemical or physical grass growing 73 1 Chemical 2 Physical 66 34 28 18 10 5 0 1 2 3 4 5 1 2 1 2 1 This change is chemical or physical rock is crushed to gravel 1 Chemical 2 Physical What chemical change occurs when a wax candle burns 1 The wax within the wick is heated to about 600 C 2 The wax near the flame melts 3 The molten wax is pulled upwards through the wick 4 The heated wax molecules combine with oxygen molecules 5 You can see light from the flame 95 5 The image shown represents which kind of matter contained in the box 69 1 2 3 4 5 18 8 5 An element A mixture A compound All of these choices None of these choices 33 28 23 15 0 1 2 1 A B C A Box A Box B Box C Both A and C contain elements Both B and C contain elements Both A and B contain elements 1 2 3 4 5 6 56 21 13 10 3 0 2 3 4 5 B 1 13 2 0 3 4 1 0 0 0 0 2 3 4 5 5 1 Elements found within a compound tend to be inert 2 Elements tend not to be soluble in water 3 Their atoms are too tightly bound to one another 4 They are too homogenous when found within a compound 5 They are too small to be divided 64 14 8 11 3 1 2 3 4 5 3 4 5 too A 3 2 Which of the following boxes contains a mixture There may be other stuff 98 Why can t the elements of a compound be separated from one another by physical means 24 3 1 C 6 What is the difference between a compound and a mixture 1 One consists of atoms from different elements the other does not 61 2 One has the particles evenly distributed the other needs to be stirred 3 One is a solid and the other is a liquid 4 The components of a mixture are not chemically bonded together 5 The way in which their atoms are bonded together 5 Box A Box B Box C Both A and C contain compounds Both B and C contain compounds Both A and B contain compounds 0 1 4 Which of the following boxes contains a compound There may be other stuff too Which of the following boxes contains an element There may be other stuff too 1 2 3 4 5 6 3 2 1 2 3 4 5 6 B C 98 Box A Box B Box C Both A and C contain mixtures Both B and C contain mixtures Both A and B contain mixtures 3 6 1 2 0 0 0 0 3 4 5 6 Oxygen atoms are part of water molecules Does this mean that oxygen O2 and water H2O have similar properties 1 No but their similar properties are only a coincidence 2 No the properties of water are uniquely different from the properties of the elements from which it is composed 3 Of course that s why we can breathe water or air 4 Yes and this explains how fish are able to breathe water 5 Yes whenever an atom is part of a compound the properties of each will be similar 51 30 11 5 1 3 2 3 4 5 2
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