1. CDB #3 Review Feb-Mar 2010

2. Science Jeopardy 5 10 15 20 25 Light 5 10 15 20 25 Electricity 10 15 20 25 Mixtures & Solutions Click anywhere on question slide for answer. Click the Back button to return to this slide. BONUS 55 10 15 20 25 CircuitsEnergyPhysical Properties 5 10 20 25 15 5 10 15 20 25

3. B A.Using a metal teaspoon B. Tasting the mixture C. Stirring the vinegar D. Using a plastic bowl Science Investigation Students mixed a spoonful of vinegar with a small amount of baking soda in a bowl. They wrote a description of what they observed. Which of these should the students have avoided while doing this investigation? Physical Properties – 5 pts. Back

4. C A. The volume of the frozen water B. The mass of the frozen water C. The temperature at which the water freezes D. The time it takes the water to freeze Some students were studying properties of water. One student placed a cup containing 80 mL of water in a freezer. Another student placed an identical cup with 40 mL of water in a different freezer. Which of the following will be the same for both cups of water? Physical Properties – 10 pts. Back

5. C A.25 C B.50 C C.100 C D.200 C Physical Properties – 15 pts. Back Water SampleVolume (ml) W50 X100 Y150 Z200 The table below shows the volume of four water samples tested in a laboratory If sample W boils at a temperature of 100 C, at what temperature would sample Z be expected to boil?

6. B A. Cardboard B. Styrofoam C. Glass D. Plastic Which of the following is the best thermal insulator? Physical Properties – 20 pts. Back

7. A A. Boiling point of water remains constant at 100° Celcius B. The amount of water affects the temperature at which water boils C. The boiling point of water does change. D. The boiling of water remains constant at 80° Celcius What conclusion can be drawn about the boiling point of water? Physical Properties – 25 pts. Back

8. C Energy – 5 pts. How does a drum produce a sound when someone strikes it with drum sticks? A. The air around the drum vibrates. B. The drumsticks vibrate. C. The drumhead and the air inside the drum vibrate. D. The drumhead and the air around the drum vibrate.

9. B What is the first thing that happens when the electrical energy in a cloud moves suddenly from the cloud to the ground? A. thunder sounds B. lightning flashes C. wind blows D. rain falls Energy for 10 points Back

10. G Energy for 15 pts. Back

11. J Energy for 20 points This picture shows what process or change of state? F.Freezing G.Boiling H.Condensing J. Melting SolidLiquid

12. A flashlight can produce light energy. It uses a battery as part of a circuit to produce light. What type of energy does the battery have? A.solar energy B.physical energy C.chemical energy D.nuclear energy C Back Energy – 25 pts.

13. B Light energy is usually refracted when passing through glass. Which of the following will reflect light energy? A. Moving Water B. Mirror C. Eyeglasses D. Microscope Light – 5 pts. Back

14. B Light for 10 points Which of the following is not luminous (Does not produce its own light)? A. the sun B. the moon C. electrical lights D. stars DAILY DOUBLE

15. D Which of the following is an example of refraction? A. When light travels between air and water B. When light comes into contact with a mirror C.When light travels between water and glass D. A and C Light – 15 pts. Back

16. C Which of the following is formed because of refraction? A. a shooting star from gases B. a comet of dust and ice C. a rainbow from sunlight and water D. none of the above Light – 20 pts. Back

17. C A Light travels In a straight line until it strikes an object. Both diagrams A and B show that? A. Light is reflected by a glass lens B. Light is reflected by a mirror C. Light is refracted by a glass lens D. Light is refracted by a mirror B Light – 25 pts. Back

18. B Which of the following is not an insulator? A. a wooden nickel B. a piece of aluminum C. a piece of cloth D. a plastic comb Electricity - 5 pts. DAILY DOUBLE

19. H Back What is formed when you switch on a lamp? F. transmission current G. a magnetic current H. electric current J. conduction current Electricity – 10 pts.

20. H Back A light bulb uses electrical energy to produce... F. light and solar energy G. light and sound energy H. light and heat energy J. mechanical energy Electricity – 15 pts. DAILY DOUBLE

21. H Back What is an advantage of an electro- magnet over a permanent magnet? F. an electromagnet attracts metals containing iron G. an electromagnet has more than one path H. an electromagnet can be turned off and on J. an electromagnet is stronger Electricity – 20 pts.

22. H Back Which of the following makes an electromagnet? F. paper clip, string, battery G. iron nail, magnet, battery H. iron nail, wire, battery J. tin can, wire, magnet Electricity – 25 pts.

23. C Back Circuits – 5 pts. A student wants to make the light bulb glow. All of the following objects can complete the circuit EXCEPT... A. an iron nail B. a metal clip C. a plastic comb D. a copper penny

24. C Back Circuits – 10 pts. What will happen when the circuit is opened? A. the nail will move towards the battery B. the nail will vibrate C. the paper clips will fall off the nail D. more paper clips will move towards the nail

25. D Back The picture shows a circuit that a student built. Why won’t the bulb light? A.The circuit does not have a power source. B.The circuit does not have a switch. C.The circuit has only one light bulb. D.The circuit is not complete. Circuits – 15 pts DAILY DOUBLE

26. D Back Which of the following are conductors of electricity? A.Gold B.Copper C.Iron D.All of the above Circuits – 20 pts

27. C Which of the following would create a closed circuit? A. a switch, a bulb and batteries B. a bulb and wires C. a battery, a bulb and wires D. none of the above Circuits – 25 pts. Back

28. J A teaspoon of clean dry sand is added to a cup of warn salt water. What is most likely to happen after the mixture is stirred and then placed on a table for 5 minutes F. The amount of water will increase G. The salt will float to the top H. The cup will heat up J. The sand will settle to the bottom Mixtures & Solutions– 5 pts. Back

29. J A small bowl contains a mixture of toothpicks and glass marbles. The easiest way to separate the mixture without touching it would be to ? F. Add glue to the mixture G. Place a magnet in the bowl H. Pour the mixture into a paper cone J. Add water to the bowl Mixtures & Solutions– 10 pts. DAILY DOUBLE

30. B Back A. Stirring the mixture B. Evaporating the water C. Adding more water D. Adding more sugar Mixtures & Solutions– 15 pts. Which process will separate the sugar from a mixture of sugar and water?

31. D Back Which of the following is an example of a mixture that is also a solution? Hint: To form a solution one substance has to dissolve A.Water and sand B.Vinegar and sand C.Salt and sugar. D.Water and salt Mixtures & Solutions– 20 pts.

32. F Back How would you separate a mixture of iron filings and sand? F. Using a magnet G. Floating the sand. H. evaporate the iron. J. Using a filter. Mixtures & Solutions– 25 pts.

33. Daily Double A C D B Back E

34. B A drop of water is placed on a small dot typed on a piece of paper. The dot.. A. appears smaller because the water is absorbed by the paper B. appears larger because the water bends light passing through it. C. looks the same D. disappears slowly Back

35. D Which of these best shows the relationship between Earth, the moon, and the sun? Back Earth Science for 15 pts.

36. C Back A switch in a circuit is used to... A. provide extra current. B. slow the flow of current. C. break or connect the flow of current. D. prevent electrical fires.

37. H Back Which instrument will be affected when it is placed next to wire carrying electric current? F. voltmeter G. battery H. compass J. thermometer

38. D A. The boiling point of water is always 100 o C. B. The freezing point of water is always 0 o C. C. Boiling and freezing points are constant. D. All of the above Which statements are true? Back