1. MIXED REVIEW QUESTIONS Award groups 1 point per correct response

2. D

3. When plants perform photosynthesis, they use sunlight to produce food. This is an example of light energy being converted to - A.mechanical energy B.electrical energy C.heat energy D.chemical energy D

4. Which energy conversions happen when wood is burned in a fireplace? A.Kinetic energy changes to potential and light energy B.Chemical energy changes to thermal and light energy C.Chemical Energy changes to electrical and light energy D.Light energy changes to potential and thermal energy B

5. B

6. DECREASES INCREASES D

7. A ball is thrown straight up in the air. According to Newton's first law of motion, what is the reason for the ball falling back to Earth? A) The change in the ball's acceleration is proportional to the force acting on it. B) It is accelerating in the same direction as Earth's gravitational force on it. C) The ball exerts a force on the air surrounding it. D) A force has acted on it.

8. A ball is thrown straight up in the air. According to Newton's first law of motion, what is the reason for the ball falling back to Earth? D) A force has acted on it. Feedback: Newton's first law of motion states that an object will remain at rest, or keep moving in a straight line with constant speed, unless a force acts on it.

9. If a force applied to an object with mass of 1 kg causes the object to accelerate 1 m/s per second, what is the force that is applied? A) 1,000 N B) 10 N C) 1 N D) 100 N

10. If a force applied to an object with mass of 1 kg causes the object to accelerate 1 m/s per second, what is the force that is applied? C) 1 N Feedback: A Newton (N) is defined as the force that produces an acceleration of 1 m/s 2 when acting on a 1-kg mass.

11. If a runner maintains a constant speed of 12 km/h, how long will it take him to complete a marathon race of 26.4 km? A) 2.18 h B) 2.2 h C) 3.14 h D) 5.3 h

12. If a runner maintains a constant speed of 12 km/h, how long will it take him to complete a marathon race of 26.4 km? B) 2.2 h Feedback: Divide the distance by the speed.

13. What causes a falling skydiver to slow down after his parachute opens? A) reference motion B) inertia C) air resistance D) gravity

14. What causes a falling skydiver to slow down after his parachute opens? C) air resistance Feedback: Air resistance slows objects moving through the air.

16. A,C B D B D

17. What two body systems are most useful in getting nutrients from the food you eat to your brain? A.muscular and endocrine systems B. nervous and digestive systems C. nervous and circulatory systems D. circulatory and digestive systems

18. What two body systems are most useful in getting nutrients from the food you eat to your brain? D. circulatory and digestive systems

19. The function of the cardiovascular or circulatory system is to transport blood throughout the body. What organ provides the force needed to transport or move the blood? A. Arteries B. Brain C. Heart D. Capillaries

20. The function of the cardiovascular or circulatory system is to transport blood throughout the body. What organ provides the force needed to transport or move the blood? C. Heart

21. Which two body systems interact to send oxygen throughout the body? A. Integumentary and muscular systems B. Skeletal and reproductive systems C. Respiratory and circulatory systems D. Digestive and nervous systems

22. Which two body systems interact to send oxygen throughout the body? C. Respiratory and circulatory systems

23. Which of the following correctly lists the subatomic particles in a fluorine atom? F 19 protons, 9 neutrons, 19 electrons G 9 protons, 10 neutrons, 9 electrons H 9 protons, 19 neutrons, 9 electrons J 9 protons, 9 neutrons, 9 electrons

24. Which of the following correctly lists the subatomic particles in a fluorine atom? G 9 protons, 10 neutrons, 9 electrons

25. A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction? A Heat is added to the sugar crystals. B The sugar melts and becomes a liquid. C The temperature of the sugar increases. D Gas is produced as the sugar turns black

26. A student observes some sugar as it is heated and burns. The student concludes that a chemical reaction has occurred. Which of the following observations about the burning sugar provides evidence of a chemical reaction? A Heat is added to the sugar crystals. B The sugar melts and becomes a liquid. C The temperature of the sugar increases. D Gas is produced as the sugar turns black

27. Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom shown above? A It has a large mass and a negative charge. B It has no mass and a positive charge. C It has mass but no charge. D It has no mass and an equal number of positive and negative charges.

28. Which of these best describes one of the subatomic particles that could be found at location X in the model of an atom shown above? A It has a large mass and a negative charge. B It has no mass and a positive charge. C It has mass but no charge. D It has no mass and an equal number of positive and negative charges.

29. An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table indicated above would the element most likely be found? A 1 B 2 C 3 D 4

30. An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table indicated above would the element most likely be found? A 1 B 2 C 3 D 4

31. According to the periodic table of elements shown above, Magnesium would have physical and chemical properties most similar to which of the following elements? A Lithium B Potassium C Chlorine D Calcium

32. According to the periodic table of elements shown above, Magnesium would have physical and chemical properties most similar to which of the following elements? A Lithium B Potassium C Chlorine D Calcium

33. How many atoms of each element are present in the compound shown above? A Carbon – 6, Hydrogen – 12, Oxygen – 6 B Carbon – 6, Helium – 12, Oxygen – 6 C Calcium – 6, Water – 18 D Chlorine – 24, Hydrogen - 24, Oxygen - 24 C 6 H 12 O 6 Glucose

34. How many atoms of each element are present in the compound shown above? A Carbon – 6, Hydrogen – 12, Oxygen – 6 B Carbon – 6, Helium – 12, Oxygen – 6 C Calcium – 6, Water – 18 D Chlorine – 24, Hydrogen - 24, Oxygen - 24 C 6 H 12 O 6 Glucose

35. What causes surface winds to blow from the ocean towards land? A Energy from oceanic tectonic plate movement transfers through the ocean to the overlying air, creating wind movement. B The radiant energy from the sun warms the land more than the water, therefore the air above the land becomes less dense. C The radiant energy from the sun warms the water more than the land, therefore the air above the land becomes more dense. D Energy from the sun electrically charges air molecules, causing them to vibrate and create wind movement.

36. What causes surface winds to blow from the ocean towards land? A Energy from oceanic tectonic plate movement transfers through the ocean to the overlying air, creating wind movement. B The radiant energy from the sun warms the land more than the water, therefore the air above the land becomes less dense. C The radiant energy from the sun warms the water more than the land, therefore the air above the land becomes more dense. D Energy from the sun electrically charges air molecules, causing them to vibrate and create wind movement.