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Atoms & Ions Properties of Water Carbon- based Chemical Reactions Enzymes 10 20 30 40 50
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Question 1 - 10 What distinguishes one element from another?
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Answer 1 – 10 The number of atoms in a sample of each element
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Question 1 - 20 What determines the properties of an element? A) protons? B) neutrons? C) electrons?
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Answer 1 – 20 Electrons
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Question 1 - 30 How is an ionic bond formed between two atoms?
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Answer 1 – 30 An electrical force forms between oppositely charged ions. In other words—opposites attract to one another
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Question 1 - 40 What term describes a substance that is made when two or more different atoms bond together in a certain ratio? A) element? B) molecule? C) compound?
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Answer 1 – 40 Compound
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Question 1 - 50 What is formed when an atom gains or loses electrons?
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Answer 1 – 50 An Ion
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Question 2 - 10 What causes hydrogen bond to form between polar molecules?
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Answer 2 – 10 The hydrogen atom in water molecules becomes negatively charged
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Question 2 - 20 Which of the following properties of water is not caused by hydrogen bonding? A) pH B) cohesion C) adhesion D) specific heat
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Answer 2 – 20 pH
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Question 2 - 30 What term describes the sugar in the glass of lemonade?
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Answer 2 – 30 solute
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Question 2 - 40 What is the pH of a neutral solution?
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Answer 2 – 40 7
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Question 2 - 50 What is an acid?
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Answer 2 – 50 A compound that releases a hydrogen ion in water.
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Question 3 - 10 How can you describe a polymer?
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Answer 3 – 10 Poly means “Many” ---like a chain of paper clips Go to: http://www.tvo.org/iqm/plastic/animations.ht ml#
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Question 3 - 20 How is a saturated fatty acid different from an unsaturated fatty acid?
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Answer 3 – 20 Saturated fatty acids contain only carbon-carbon single bonds
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Question 3 - 30 What kinds of bonds link the monomers in a protein?
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Answer 3 – 30 Hydrogen bonds
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Question 3 - 40 What is the relationship between a momomer and a polymer?
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Answer 3 – 40 Monomers are linked together to form a polymer
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Question 3 - 50 In what kind of molecule are the instructions for building proteins stored?
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Answer 3 – 50 Nucleic acid
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Question 4 - 10 How do endothermic and exothermic reactions differ?
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Answer 4 – 10 Activation energy must be added to exothermic reations Heat goes out in exothermic (ice cubes) Heat goes in in endothermic (melting ice)
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Question 4 - 20 What are the reactants and the products in the following reaction? 2H202 2H20 + O2
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Answer 4 – 20 Reactant is H202 Products are: H20 and 02
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Question 4 - 30 What term describes the amount of energy that must be absorbed before a chemical reaction can start?
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Answer 4 – 30 Activation energy http://app.discoveryeducation.com/player/?a ssetGuid=90e3b996-b49f-4b86-8f7b- 4d83cf3a815c&fromMyDe=0&isPrinterFriendl y=0&provider=&isLessonFromHealth=0&prod uctcode=US&isAssigned=false&includeHeader =YES&homeworkGuid= http://app.discoveryeducation.com/player/?a ssetGuid=90e3b996-b49f-4b86-8f7b- 4d83cf3a815c&fromMyDe=0&isPrinterFriendl y=0&provider=&isLessonFromHealth=0&prod uctcode=US&isAssigned=false&includeHeader =YES&homeworkGuid
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Question 4 - 40 What is a catalyst?
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Answer 4 – 40 Substance that decreases activation energy and increases reaction rater in a chemical reaction without becoming part of the product.
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Question 4 - 50 What statement about chemical reactions and energy is correct? Energy must be added to form new bonds Or Energy is released when new bonds are formed.
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Answer 4 – 50 Energy is released when new bonds are formed.
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Question 5 - 10 What are the parts that make up the lock-and- key model of enzyme function?
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Answer 5 – 10 Enzyme and substrates
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Question 5 - 20 What happens to a catalyst during a chemical reaction?
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Answer 5 – 20 It is not changed
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Question 5 - 30 How does a catalyst affect the activation energy of a chemical reaction?
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Answer 5 – 30 It lowers the activation energy of the reaction
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Question 5 - 40 What term describes the reactants that an enzyme acts on?
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Answer 5 – 40 product
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Question 5 - 50 Which conditions are likely to affect the shape of an enzyme?
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Answer 5 – 50 Both temperature and pH
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