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Contemporary's GED Science

Physics

# GED Practice Quiz

## Directions:

Choose the one best answer to each question. When you have finished the quiz, click on Submit Answers to receive feedback and results. You may also choose to e-mail your results to your instructor.

 1 Seat belts and air bags are designed to protect drivers and passengers in case of a crash in which a car stops suddenly. Which of the following statements BEST explains how seat belts and air bags provide protection. A) Seat belts and air bags decrease car damage during a collision by decreasing the energy expanded during the collision. B) Seat belts and air bags help slow down a moving vehicle during the moments immediately following impact. C) Seat belts and air bags prevent occupants from continuing to move forward when the car is suddenly stopped. D) Seat belts and air bags can themselves injure the driver because of the reaction force they exert during a collision. E) Without a seat belt or an air bag, both the driver and passengers will continue to move forward until an applied force slows them down. 2 Astronauts make an emergency landing on a newly discovered planet. They know the planet is about the same size as Earth. They observe that their weight is one third of their weight on Earth. Which of the following is a reasonable conclusion? A) The new planet weighs more than Earth. B) The new planet has more mass than Earth. C) The astronauts gained weight during the emergency. D) The new planet has a smaller radius than Earth. E) The new planet has less mass than Earth. 3 Jeninne was explaining her ride on the roller coaster at the nearby theme park. She knew that the greatest potential energy was at the top of the first hill, and the least amount of potential energy was at the bottom of the first hill. Which statement below is also true about a roller coaster ride? A) The more people in the coaster, the faster the coaster moves. B) The roller coaster moves faster if there are fewer people in the cars. C) The greatest speed of the coaster is at the top of the first hill. D) The slowest coaster speed is at the bottom of the first hill. E) No hill in the coaster ride can be higher than the first hill. 4 Monty poured sand into a plastic foam cup until it was half full. Next, he measured the temperature of the sand. He covered the cup and then briskly shook it for several minutes. When he stopped shaking the cup, he immediately measured the temperature of the sand a second time. Which statement below describes and explains Monty’s observations? A) The temperature was the same before and after shaking the cup. Nothing happened. B) The temperature was lower after shaking the cup than before. C) The temperature of the cup was higher after shaking. Heat energy flowed from the cup to Monty's hand as he shook the cup. D) The temperature of the sand in the cup was higher before Monty shook it. E) The temperature of the cup was higher after shaking. Monty added energy to the cup by shaking it.

Question 5 refers to the following information.

The wavelength of a wave is the distance from one crest to another, BC, or from one trough to another. The wavelength, frequency, and speed of a wave are related by the formula speed = wavelength × frequency. The distance AB is the height, or amplitude, of the wave. The greater the amplitude, the more energy the wave carries.

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