2. Atoms & Ions Properties of Water Carbon- based Chemical Reactions Enzymes 10 20 30 40 50

3. Question 1 - 10 What distinguishes one element from another?

4. Answer 1 – 10 The number of atoms in a sample of each element

5. Question 1 - 20 What determines the properties of an element? A) protons? B) neutrons? C) electrons?

6. Answer 1 – 20 Electrons

7. Question 1 - 30 How is an ionic bond formed between two atoms?

8. Answer 1 – 30 An electrical force forms between oppositely charged ions. In other words—opposites attract to one another

9. 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?

10. Answer 1 – 40 Compound

11. Question 1 - 50 What is formed when an atom gains or loses electrons?

12. Answer 1 – 50 An Ion

13. Question 2 - 10 What causes hydrogen bond to form between polar molecules?

14. Answer 2 – 10 The hydrogen atom in water molecules becomes negatively charged

15. 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

16. Answer 2 – 20 pH

17. Question 2 - 30 What term describes the sugar in the glass of lemonade?

18. Answer 2 – 30 solute

19. Question 2 - 40 What is the pH of a neutral solution?

20. Answer 2 – 40 7

21. Question 2 - 50 What is an acid?

22. Answer 2 – 50 A compound that releases a hydrogen ion in water.

23. Question 3 - 10 How can you describe a polymer?

24. Answer 3 – 10 Poly means “Many” ---like a chain of paper clips Go to: http://www.tvo.org/iqm/plastic/animations.ht ml#

25. Question 3 - 20 How is a saturated fatty acid different from an unsaturated fatty acid?

26. Answer 3 – 20 Saturated fatty acids contain only carbon-carbon single bonds

27. Question 3 - 30 What kinds of bonds link the monomers in a protein?

28. Answer 3 – 30 Hydrogen bonds

29. Question 3 - 40 What is the relationship between a momomer and a polymer?

30. Answer 3 – 40 Monomers are linked together to form a polymer

31. Question 3 - 50 In what kind of molecule are the instructions for building proteins stored?

32. Answer 3 – 50 Nucleic acid

33. Question 4 - 10 How do endothermic and exothermic reactions differ?

34. 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)

35. Question 4 - 20 What are the reactants and the products in the following reaction? 2H202 2H20 + O2

36. Answer 4 – 20 Reactant is H202 Products are: H20 and 02

37. Question 4 - 30 What term describes the amount of energy that must be absorbed before a chemical reaction can start?

38. 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

39. Question 4 - 40 What is a catalyst?

40. Answer 4 – 40 Substance that decreases activation energy and increases reaction rater in a chemical reaction without becoming part of the product.

41. 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.

42. Answer 4 – 50 Energy is released when new bonds are formed.

43. Question 5 - 10 What are the parts that make up the lock-and- key model of enzyme function?

44. Answer 5 – 10 Enzyme and substrates

45. Question 5 - 20 What happens to a catalyst during a chemical reaction?

46. Answer 5 – 20 It is not changed

47. Question 5 - 30 How does a catalyst affect the activation energy of a chemical reaction?

48. Answer 5 – 30 It lowers the activation energy of the reaction

49. Question 5 - 40 What term describes the reactants that an enzyme acts on?

50. Answer 5 – 40 product

51. Question 5 - 50 Which conditions are likely to affect the shape of an enzyme?

52. Answer 5 – 50 Both temperature and pH