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A.Direction:Read each item carefully and choose and write the letter that corresponds to the correct answer. __1.Which is an ideal reference point? A.A colored object B.A person running C.A cloud in the sky D.A nonmoving landmark __2.What is the basic unit for measuring time? A.Hour B.Minute C.Second D.Month __3.What is the basic unit for measuring distance? A.Feet B.Meter C.Centimeter D.Kilometer __4.JJ runs at an average speed of 6 kph. if he runs for 51/2 hours,how far does he travel? A.30km B.32km C.33km D.35km __5.What is the average speed of the cyclist if he travels 30 kilometers in two hours? A.10 km/h B.15 km/h C.30 km/h D.60 km/h __6.Bella is walking along a sidewalk. Which of the following sentence is true? A.Bella is not moving with respect to the sun. B.Bella is not moving with respect to the sidewalk. C.Bella is moving with respect to the building at the corner. D.Bella is moving with respect to another person who is walking beside her. __7.Some materials allow an electric current to flow through them. They are called __ electricity. A.Conductors B.Convectors C.Insulators D.Radiators __8.Which of the following materials are good conductors of heart? A.Glass,cloth,paper B.Iron nail,silver,cooper C.Aluminum,plastic,rubber D.Ceramic cups,disposable glass,silver __9.Which is a poor conductor of electricity? A.Copper B.Rubber C.Silver D.Water __10. Why is electricity wiring usually covered with layer of plastic? A.To help electricity flow along the wire B.To make it look better C.To save electricity D.To make it safe __11.Why is aluminum used in making cooking pans? A.it is very strong B.it has a very high density. C.it is a good conductor heat. D.it is a good conductor of electricity.
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