Chemistry is:

1. Chemistry is: 1.1 The mystical search for the meaning of life The science of what matter does by studying atoms and molecules The speculation about the nature of atoms and molecules None of these All of these

2. Chemistry is: 1.1 The mystical search for the meaning of life The science of what matter does by studying atoms and molecules The speculation about the nature of atoms and molecules None of these All of these

3. Theories are validated by: 1.2 Observations Models Laws Experiments Guesses

4. Theories are validated by: 1.2 Observations Models Laws Experiments Guesses

5. A brief statement that summarizes past observations and predicts future ones is called a: 1.3 Scientific theory Scientific law Hypothesis Fact Experiment

6. A brief statement that summarizes past observations and predicts future ones is called a: 1.3 Scientific theory Scientific law Hypothesis Fact Experiment

7. The scientific method emphasizes: 1.4 Observations and experimentation Facts and scientific laws Theories and experimentation Hypotheses and models None of the above

8. The scientific method emphasizes: 1.4 Observations and experimentation Facts and scientific laws Theories and experimentation Hypotheses and models None of the above

9. Which term best fits the following definition: A theory before it has become well established? 1.5 Observation Scientific method Scientific law Scientific theory Hypothesis

10. Which term best fits the following definition: A theory before it has become well established? 1.5 Observation Scientific method Scientific law Scientific theory Hypothesis

11. Which of the following would NOT be considered matter? 1.6 Water Sugar Light Gasoline Sand

12. Which of the following would NOT be considered matter? 1.6 Water Sugar Light Gasoline Sand

13. What is the first step in the scientific method? 1.7 1. Observe some aspect of nature 2. Develop a scientific hypothesis 3. Design a detailed experiment 4. Check the results in triplicate 5. Develop a scientific law to summarize observations

14. What is the first step in the scientific method? 1.7 Observe some aspect of nature Develop a scientific hypothesis Design a detailed experiment Check the results in triplicate Develop a scientific law to summarize observations

15. The connections that hold atoms to each other are called: 1.8 Sticky atoms Strong attachments Chemical bonds Molecular bonds Attractive forces

16. The connections that hold atoms to each other are called: 1.8 Sticky atoms Strong attachments Chemical bonds Molecular bonds Attractive forces

17. Which of the following statements best describes the Law of Conservation of Mass? 1.9 All matter contains the same mass. Matter can be converted to less massive things. Matter can be converted to more massive things. Mass is neither created nor destroyed in a chemical reaction. Mass can be either created or saved in a chemical reaction.

18. Which of the following statements best describes the Law of Conservation of Mass? 1.9 All matter contains the same mass. Matter can be converted to less massive things. Matter can be converted to more massive things. Mass is neither created nor destroyed in a chemical reaction. Mass can be either created or saved in a chemical reaction.

19. Which of the following can be classified as matter? 1.10 Lead Salt Car Chair All of the above

20. Which of the following can be classified as matter? 1.10 Lead Salt Car Chair All of the above

21. What is one important quality for being a successful chemist? 1.11 Curious Courageous Competent Clueless Careful

22. What is one important quality for being a successful chemist? 1.11 Curious Courageous Competent Clueless Careful

23. Which one of the following scientists stated and studied the Law of Conservation of Mass? 1.12 Dalton Lavoisier Proust Rutherford Aristotle

24. Which one of the following scientists stated and studied the Law of Conservation of Mass? 1.12 Dalton Lavoisier Proust Rutherford Aristotle

25. Which scientist proposed that all matter was composed of small, indestructible particles called atoms? 1.13 Dalton Lavoisier Proust Rutherford Aristotle

26. Which scientist proposed that all matter was composed of small, indestructible particles called atoms? 1.13 Dalton Lavoisier Proust Rutherford Aristotle

27. Which of the following is a chemical? 1.14 Air Shampoo Water Turpentine All of the above

28. Which of the following is a chemical? 1.14 Air Shampoo Water Turpentine All of the above

29. What is the difference between a scientific hypothesis and a theory? 1.15 Only a scientific hypothesis can be scrutinized, while a theory is generally accepted and never changes. A hypothesis is a summary of observed behavior, while a theory is an explanation of the behavior. Once a hypothesis has been proven to be accurate, it becomes a theory. A scientific hypothesis is a testable assumption, while a theory is an accepted model used to explain the way nature is and predict future behavior. A hypothesis is a definite explanation for an observation, while a theory is just an educated guess.

30. What is the difference between a scientific hypothesis and a theory? 1.15 Only a scientific hypothesis can be scrutinized, while a theory is generally accepted and never changes. A hypothesis is a summary of observed behavior, while a theory is an explanation of the behavior. Once a hypothesis has been proven to be accurate, it becomes a theory. A scientific hypothesis is a testable assumption, while a theory is an accepted model used to explain the way nature is and predict future behavior. A hypothesis is a definite explanation for an observation, while a theory is just an educated guess.

31. Which of the following is an example of a scientific theory? 1.16 The addition of battery acid to sugar results in the formation of a black substance and smoke. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. A pure compound always contains definite or constant proportions of elements by mass. None of the above

32. Which of the following is an example of a scientific theory? 1.16 The addition of battery acid to sugar results in the formation of a black substance and smoke. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. A pure compound always contains definite or constant proportions of elements by mass. None of the above

33. Which of the following is an example of an observation? 1.17 Energy may be converted from one form to another, but the total quantity of energy remains constant. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. A pure compound always contains definite or constant proportions of elements by mass. None of the above

34. Which of the following is an example of an observation? 1.17 Energy may be converted from one form to another, but the total quantity of energy remains constant. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. A pure compound always contains definite or constant proportions of elements by mass. None of the above

35. Which of the following is a scientific law? 1.18 Energy may be converted from one form to another, but the total quantity of energy remains constant. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. At absolute zero, the motion of all atoms stop. None of the above

36. Which of the following is a scientific law? 1.18 Energy may be converted from one form to another, but the total quantity of energy remains constant. Gases consist of molecules in constant random motion. The burning of wood results in a flame, heat, smoke, and ash. At absolute zero, the motion of all atoms stop. None of the above