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OL bu - Choose the letter of the correct answer. Write your answer on the blank before the number. 1. What condition can prove that an object is in motion? D. Its change in size A. Its change in position B. Its change in weight C. Its change in color 2. How will you know the distance of an object to another object? A. Hit the object. B. Stare at the object C.Throw stones at the object. D.Measure the gap etween the two objects. 3. What instrument is used to measure speed? A barometer B. displacement C. speedometer D.thermometer 4. Which of the following refers to the perspective that one uses to determine if an object is moving A. frame of reference B.position C. reference point D.state of rest 5. What refers to the movement of an object along the circumference of a circle ? A.circular motion B. rectilinear motion C.rotational motion D.zigzag motion​