8 th Grade Science Bowl EOG Competition

1. 8th Grade Science Bowl EOG Competition

2. DON’T FORGET When you get your EOG booklet – label your periodic table first thing!

3. Face Off – CALL MY BLUFF! • Team 1 question : all stand if know the answer (5 seconds) • Team 2 : pick person standing to answer • Team 1 : if correct win as many as standing • If lose: if wrong lose as many as standing • Cant pick the same person in a row • Only the students who are up can speak… you CAN NOT give your teammates help. If you call out a point goes to the other team.

4. HOLD UP! • There’s a CATCH… • You must also ONLY demonstrate POSITIVE actions – any put downs or negative statements towards other team/teammates results in immediate independent loss of points. Everyone makes mistakes, let’s focus on being EXTRAORDINARY!!!

5. Rules and Regulations This is a team exercise. No put downs or making fun of anyone. Keep in mind… The ultimate goal is for EVERY 8th grader to score a 3 or 4. So help each other out!

6. Let's Begin… You EOG

7. Which of the following is an example of a mixture? • Melting ice • Sand water • Boiling water • Alcohol in water

8. Answer B) Sand in water

9. The reactants involved in a chemical reaction are shown: Na 2 O + H 2 O -- ? How many O atoms must be present in the product that forms from this reaction? • 1 • 2 • 3 • 4

10. Answer B) 2

11. Which of the following may happen during a physical change? • New substances are formed • Reactants form products • A precipitate is formed • The temperature may increase

12. Answer D) The temperature may increase

13. Which of the following compounds contains the greatest number of atoms? • CO 2 • C22H46 • C6H12O6 • CH4

14. Answer B) C22H46

15. Which of the following is an example of a chemical change? • Water evaporating • Wood burning • Ice cream melting • Face blushing

16. Answer B) Wood Burning

17. Carlos has two unidentified liquids labeled A and B. The liquids look similar, but they are different colors. Carlos needs to determine if the two liquids have the same density. To do this, Carlos decides to combine the liquids. Will combining the liquids help Carlos determine if the densities are the same? • No, it will not be possible to tell them apart once they are mixed. • Yes, the liquids will form separate layers if their densities are different. • Yes, a reaction will occur if the densities are not the same. • No, density has nothing to do with how the liquids mix.

18. Answer B) Yes, the liquids will form separate layers if their densities are different.

19. You test the local stream water with a pH indicator strip. It turns a light orange for a pH of 4. What does this indicate about the water in the stream? • The water is a strong acid. • The water is a strong basic. • The water is a weak acid. • The water is a strong base.

20. Answer C) The water is a weak acid.

21. Amber plans to build an electric motor for her science fair project. She decides to test how well different materials conduct electricity from the batteries to the motor. Which of the following materials will be the best conductor for Amber’s motor? • A copper wire • A rubber band • A glass rod • A neon bulb

22. Answer A) A copper wire

23. A scientist wants to study the effects of acid rain on the water quality in a lake. Which of the following pieces of equipment would be most useful to the scientist? • pH meter • barometer • GPS • Dissolved oxygen meter

24. Answer A) pH meter

25. Where is the majority of Earth’s freshwater located? • Rivers • Lakes • Groundwater • Glaciers

26. Answer D) Glaciers

27. Approximately 70% of Earth’s surface is covered with water. What percentage of this water is salt water? • 67% • 77% • 87% • 97%

28. Answer D) 97%

29. Which of the following structures is responsible for breaking down water and worn-out cell parts? • Ribosome • Vacuole • Lysosome • Mitochondrion

30. Answer C) Lysosome

31. Which of the following statements is not a characteristic of a living thing? • Must be able to breathe • Must be made of cells • Must be able to grow and reproduce • Must be able to respond to its environment

32. Answer A) Must be able to breathe

33. Mitochondria bread down food and release energy for the cell. In which type of cell would you expect to find the most mitochondria? • Skin cells • Muscle cells • Nerve cells • Fat cells

34. Answer B) Muscle Cells

35. Which of the following is a poor conductor of heat? • Metals • Metalloids • Nonmetals • Electrons

36. Answer C) Nonmetals

37. Why is drinking water treated before it is pumped to homes? • To kill microscopic organisms that could make people sick • To make sure that it tastes good • To make sure that the water is clear • To add microscopic organisms that will make the water safe to drink.

38. Answer A) To kill microscopic organisms that could make people sick

39. What is the smallest unit of life? • Matter • Mass • Cilia • Cells

40. Answer D) Cells

41. Which of the following statements is accurate about the fossils found in layer C? • Fossils found in layer C are older than fossils found in layer D. • Fossils found in layer C are younger than fossils found in layer G. • Fossils found in layer C are older than fossils found in layer A. • Fossils found in layer C are younger than fossils found in layer A.

42. Answer C) Fossils found in layer C are older than fossils found in layer A.

43. What is the youngest layer of earth shown in this diagram? • A • E • G • F

44. Answer C) G

45. What percentage of the Earth’s water is contained in oceans? • About 3% • About 29% • About 71% • About 97%

46. Answer D) 97%

47. What two quantities must be known to calculate the density of a sample of matter? • Color and mass • Mass and volume • Length and mass • Solubility and mass Extra points: What is the formula for Density?

48. Answer B) Mass and Volume Density= Mass/ volume

49. What mass (in grams) of oxygen (02) is required for this reaction to occur? CH4 + 02 --- 2CO2 + H20 16 g ? 44g 36g • 16 • 36 • 44 • 64

50. Answer D) 64