2008-2009
A. Matching- Match the vocabulary word to the statement that describes it.
_____1. Control a. tells whether hypothesis was supported or not.
_____2. Results b. a statement based on true facts and the 5 senses
_____3. Independent c. scientific system of measurement
_____4. Inference d. a problem or something you want to find out
_____5. Conclusion e. what the “scientist” changes in an experiment
_____6. Observation f. what remains unchanged in an experiment
_____7. Question g. an interpretation about an observation
_____8. SI h. where data is organized into charts, graphs, or tables
B. Multiple Choice- Choose the letter that best answers the question.
_____9. The ______variable is controlled or manipulated by the experimenter.
a) dependent b) control c) independent d)deviant
_____10. Why is it so important to have only one independent variable in an experiment?
a) so your results will be right b) so you know what caused your results
c) so your experiment will be safe
_____11. What is a testable statement or educated guess?
a) question b) inference c) estimation d) hypothesis
_____12. Which is not an SI unit? a). cm b). dkg c). ft d). mL
_____13. Observations are based on ______?
a) guesses b) facts c) fiction d) inferences
_____14. The orderly method that scientists use to solve problems is called
a) hypothesis b) scientific method c) theoretical method d) experiment
_____15. Which of the following conversions is not correct?
a). 1000g= 1kg b). 1m= 100cm c). 100,000mL= 1L
_____16. Samantha collected information on rainfall amounts and level of pesticides in river water for a period of ten months. She concluded that pesticide levels rose significantly in the water after each rainfall. What was her research problem?
A) Does river water contain pesticides?
B) Does rainfall runoff affect pesticide levels in river water?
c) What is the effect of pesticides in river water?
d) Do more pesticides get into river water during summer months?
_____17. Which is not an example of a hypothesis?
a) Earthquakes happen because of stresses along plate boundaries.
b) Some animals can detect ultrasound frequencies caused by earthquakes.
c) Paintings are prettier than sculptures.
d) Lava takes different forms depending on how it cools.
C. Observation or inference: Read each statement and then write if it is an observation or an inference.
______18. Ms. Edwards’ writing spider is black and yellow.
______19. The writing spider must be deadly to humans.
______20. Adojame is in class today.
______21. He is ready to take his test.
Answer the questions using the graph.
22. Make one observation about the graph?
23. Around what time of day was there a peak in the number of students sick at Beck?
24. Make an accurate inference based on the peak in sickness?
F. Identify the variables in the problems below:
25. Mr. Gardner wants to know if adding fertilizer to his tomato plants will help them grow. He adds fertilizer to all of them except one. What is the control? Independent? Dependent?
26. Hootie, the Blowfish, asked the question, “does salt water freeze faster than normal fresh water”? What is the control? Independent? Dependent?
G. Short Answer-
Correctly, fill in the steps of the scientific method. 27. ______
HYPOTHESIS
28. ______
29. ______
30. ______
CONCLUSION
H. Practicum-
Using the designated lab stations, find the answers to the following.
31. What is the area of the calculator in centimeters?
32. This soda bottle is able to hold how many liters?
33. a. Find the mass of the box of tissues in grams.
b. Now find the volume of the box of tissues using cm3.
34. Read and record how many mL are in the graduated cylinder.