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1. The illustration shows an open circuit. In order to close the circuit and turn on the light a piece of wire needs to be added from A from A to C B from A to D C from B to C D from C to D

2. B from A to D

3. What is the operating principal of a series circuit?

4. In a series circuit, electricity has only one path to follow. If any part of that path fails (breaks) and opens the circuit, everything on the circuit stops working.

5. What is the operating principal of a series circuit?

6. In a parallel circuit, electricity has more than one path to follow. If any part of that path fails (breaks) the other branches can still work.

7. B A D C

8. A No, this is an open circuit. Electricity cannot flow through an open circuit.

9. D Nope, another open circuit.

10. The phrase, “Opposites attract and likes repel” applies to static electricity as well as magnetism.

11. Like charges cause objects to be repelled from each other.

12. Unlike charge causes objects to be attracted to each other.

13. One lightning bolt can have from 1-10 million volts of static electricity. The temperature at the core can be as high as 30,000°C.

14. Which position in the following slide shows the correct position for reading the volume of a liquid in a graduated cylinder? A 1 B 2 C 3 D 4

15. The correct position for reading the volume of a liquid in a graduated cylinder number 3 so the bottom of the meniscus is at eye level.

16. Identify the numbered wave characteristics

17. wavelength

18. trough

19. amplitude

20. crest

21. The following slide shows an experiment set up to test the hypothesis that plants grow better in green light. What is the independent variable (a/k/a the manipulated variable)?

22. Red Green Yellow Trial 3 Trial 2 Trial 1

23. The independent variable (a/k/a the manipulated variable) is the color of light. What change in the set-up would produce more reliable results?

24. What change in the set-up would produce more reliable results? Using only one type of plant would produce more reliable results.

25. What should be used as the control for the experiment? A plant grown under ordinary light.

26. List in the correct order the energy conversions that occur after the flashlight’s switch is put in the “on” position.

27. Stored chemical energy to electrical energy to light energy (and heat energy).

28. A B Which wire has a higher resistance to the flow of electricity?

29. B Wire B has more resistance to the flow of electricity. The thinner and or longer the wire the greater the resistance.

30. The following slides show an experiment set up to test the electrical con-ductivity of different sub-stances. Of the substances tested, which would make the best conductor to complete the circuit so the bulb will light?

31. In this experiment, aluminum was the best conductor.

32. The graph in this illustration is a ___ graph. The graph in this illustration is a bar graph.

33. This line graph above shows the heights of plants grown in fertilized and unfertilized soil.

34. F. Neither plant should increase by 1 cm in height. Based on this data, what will most likely happen on day six? G. Plant A should increase about 1 cm in height. H. Plant B should increase about 1 cm in height. J. Plant A should increase about 2 cm in height.

35. F. Neither plant should increase by 1 cm in height.

36. In which illustration are the skateboarder’s kinetic energy and potential energy about equal? A B The skateboarder’s kinetic energy and potential energy are about equal in illustration B.

37. The chart in the following slide represents the type and number of items collected in a beach cleanup. Based on the chart, what percentage of the total items collected from the beaches was plastic?

38. A 46% B 49% C 56% D 70%

39. C. 56% Circle Graph

40. This illustration shows a pond ecosystem. What would most likely happen if all the lily plants were removed from this community?

41. F There would be more oxygen in the air. G The pond currents would be slower. H There would be more kinds of animals in the pond. J The animals would have fewer places to hide.

42. J The animals would have fewer places to hide.

43. Both bulbs are lit in the circuit above. In order to turn off both lights, a switch must be installed in the circuit in the position marked