8. How do scientists test their hypothesis? A. Design models B. Draw conclusions C. Do experiments. D. Formulate questions.

9. Which of the following steps to solve a problem must be completed last? A. Analyzing data B. Testing hypothesis C. Drawing conclusions. D. Recognizing and identifying the problem.

10. What did the scientist use when she listened to the sounds that whales make? A. Draw conclusion B. Formulating hypothesis. C. Making Observations. D. Interpret data.

11. The following are examples of elements EXCEPT A. Carbon B. Magnesium C. Silicon D. Water

12. A substance that cannot be broken down into simpler form through ordinary chemical means is called alan A. Atom B. Compound C. Water D. Element

14. Which of the following statements is TRUE? A. Compounds are more complex than elements B. Water is composed of more than two elements. C. Compound can be broken down by physical means. D. Compounds cannot be broken down into simpler substances.

15. Which of the following substances is an element? A. Air B. Sugar C. salt D. Iron​