Physics STAAR Review
Quiz by Kylie Middleton
Grade 8
Science (2010) (Archived)
Texas Essential Knowledge and Skills (TEKS)
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13 questions
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- Q1Which of the following describes the energy transformations that occur when a battery-powered flashlight is turned on?Chemical > electrical > lightChemical > light > mechanicalMechanical > thermal > lightElectrical > chemical > light30s
- Q2An object is at rest on a level surface. The forces acting on it are illustrated.Which of the following correctly describes the resultant change to the object?The object will start to accelerate toward the east.The object will move at a constant speed to the east.The object will start to accelerate toward the west.The object will move at a constant speed to the west.30s8.6.A: Force, Motion and Energy
- Q3A force of 3,000 N is applied to a car, resulting in acceleration. In 10 s, the car increases its velocity from 0 m/s to 30 m/s. What is the mass of the car?1,500 kg1,000 kg4,500 kg3,000 kg30s8.6.A: Force, Motion and Energy
- Q4A marble is allowed to roll up and down the sides of a bowl. At which two points will the marble have the greatest potential energy?3 and 42 and 31 and 41 and 230s
- Q5The diagram below shows a boat moving north in a river at 3 m/s while the current in the river moves south at 1 m/s. How will the boat be affected if it enters a part of the river where the current is moving south at 2 m/s?The boat will stop.The boat will move faster.The boat will move to the west.The boat will move slower.120s
- Q6The diagram provided shows the initial velocity of Earth and the gravitational pull of the Sun on Earth. Which arrow represents the resultant direction of motion of Earth?Arrow 3Arrow 1Arrow 4Arrow 2120s8.6.A: Force, Motion and Energy
- Q7Users enter free textType an Answer120s8.6.B: Force, Motion and Energy
- Q8The graph below shows the motion of an object. Which statement best describes the motion of the object between points X and Y?The object’s speed increased.The object stopped moving.The object slowed down.The object’s distance decreased.120s
- Q9A 70 kg adult and a 35 kg child face each other on ice skates. According to Newton’s laws of motion, what will happen if the two skaters push against each other?They will both move backward at the same speed.They will both move backward, but the child will move at a faster speed.The adult will move backward, but the child will not move.The adult will not move, but the child will move backward.120s8.6.C: Force, Motion and Energy
- Q10During a demonstration of Newton’s laws of motion, a student used the setup shown in Figure 1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.120s8.6.C: Force, Motion and Energy
- Q11In which of the following situations will the ball have the greatest acceleration?A soccer ball with a mass of 0.45 kg is kicked with a force of 20 N.A bowling ball with a mass of 7.2 kg is thrown with a force of 60 N.A golf ball with a mass of 0.045 kg is struck with a force of 1 N.A baseball with a mass of 0.142 kg is hit with a force of 5 N.120s8.6.C: Force, Motion and Energy
- Q12A basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s ^2 2? Be sure to use the correct place value.Users enter free textType an Answer120s
- Q13A student jumps off a sled toward the west after it stops at the bottom of an icy hill. Based on the law of action–reaction, in what direction will the sled most likely move as the student jumps off?WestSouthEastNorth120s8.6.C: Force, Motion and Energy
