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Which material is the best conductor of electricity?

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Presentation on theme: "Which material is the best conductor of electricity?"— Presentation transcript:

1 Which material is the best conductor of electricity?
Wood Metal Stone Plastic

2 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

3 An unusual type of fossil clam is found in rock layers high in the Swiss Alps. The same type of fossil clam is also found in the Rocky Mountains of North America. From this, scientists conclude that Glaciers carried the fossils up the mountains The Rocky Mountains and the Swiss Alps are both volcanic in origin Clams once lived in mountains, but have since evolved into sea-dwelling creatures The layers of rocks in which the fossils were found are from the same geologic age

4 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

5 Which characteristic is shared by all cells?
They need energy. They reproduce sexually. They make their own food. They move from place to place.

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7 The wind The Sun Air pressure Ocean currents
Water evaporates and falls back to Earth as rain or snow. What is the primary energy source that drives this cycle? The wind The Sun Air pressure Ocean currents

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9 Point X in the diagram above shows the highest point above the horizon that the Sun reaches in the spring at noon. When is the Sun’s position most likely to be at point Y? In the afternoon on a winter day In the afternoon on a summer day At noon on a winter day At noon on a summer day

10 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

11 The flashlight shown below has no batteries
The flashlight shown below has no batteries. It is operated by squeezing and letting go of the handle. Inside the body of the flashlight are gears, which are shown below Which sequence best identifies the energy transfers that take place within the flashlight to produce light? A. Kinetic → electrical → light B. Kinetic → chemical → light C. Chemical → kinetic → light D. Chemical → electrical → light

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13 Three funnels were filled with equal volumes of pebbles, fine sand, and coarse sand, as shown in the diagram below. The same amount of water was poured into each funnel. Which correctly lists the order in which the water passed through the funnels, from fastest to slowest? Pebbles, fine sand, coarse sand Pebbles, coarse sand, fine sand Fine sand, coarse sand, pebbles Coarse sand, pebbles, fine sand

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15 A student wants to know whether two cups hold the same volume of water
A student wants to know whether two cups hold the same volume of water. The two cups have different weights (masses). The student completely fills Cup 1 with water. The student wants to measure if Cup 2 holds the same volume of water. What should the student do next to complete the measurement? Completely fill Cup 2 with water and then look at the cups side by side Pour half of the water from Cup 1 into Cup 2, weigh each cup and then compare their weights Pour all of the water from Cup 1 into Cup 2 to see if the water completely fills Cup 2 without spilling over Completely fill Cup 2 with water, weigh each filled cup, and then compare the weights

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17 Which cup was in the refrigerator? Cup A Cup B
A student poured the same amount of water into two identical cups. He put one cup in a refrigerator and left one cup out in a warm room. Neither cup was touched. The diagram below shows how much water was left in the cups two days later. Which cup was in the refrigerator? Cup A Cup B

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19 The following diagram represents a portion of the Earth’s water cycle.
Using your knowledge of the water cycle, explain why rainwater is not salty, even though ocean water is.

20 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

21

22 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

23 In the right triangle above, what is the length of AB? 8.5 12 13 17 30

24 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

25 A turkey is put in the oven at 10:30 a. m
A turkey is put in the oven at 10:30 a.m. If the turkey takes 2 ¾ hours to cook, at what time should it be taken out of the oven? 12:15 p.m. 12:45 p.m. 1:15 p.m. 1:45 p.m.

26 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

27 On the scale drawing above, the shaded area represents a piece of property along the river. Which of the following measurements is the best estimate of the area of the property? 750 square meters 850 square meters 900 square meters 1,050 square meters 1,200 square meters

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29 Which of the following equations is NOT equivalent to the equation n + 18 = 23

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31 Robert has $30 and wants to buy as many bags of peanuts as possible
Robert has $30 and wants to buy as many bags of peanuts as possible. He does not have to pay any sales tax on food that he buys. Based on the prices given in the chart above, how many bags of peanuts can Robert buy? Answer _________________ Robert buys all the bags of peanuts that he can. What is the most expensive single item on the chart that he can buy with the money he has left? Answer ________________

32 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

33 The length of a rectangle is 3 feet less than twice the width, w (in feet). What is the length of the rectangle in terms of w? 3 – 2w 2(w + 3) 2(w – 3) 2w + 3 2 w - 3

34 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

35 If n is any integer, which of the following expressions must be an odd integer?

36 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

37 Parallelograms ABCD and PQRS above are similar
Parallelograms ABCD and PQRS above are similar. What is the length of side QR? 4.5 9 12 15 18

38 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

39 The number of gallons of water, y, in a tank after x hours may be modeled by the linear equation y = 800 – 50x. Which of the following statements about the tank is true? It is filling at a rate of 800 gallons per hour. It is filling at a rate of 50 gallons per hour. It is emptying at a rate of 16 gallons per hour. It is emptying at a rate of 50 gallons per hour. It is emptying at a rate of 800 gallons per hour.

40 Missouri Kentucky Virginia North Carolina Tennessee Arkansas Mississippi Georgia Alabama

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