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- 1. Multiple ChoiceAccording to the article, what do high-energy particles do to the brains of mice?The particles change the shapes of brain cells.The particles give certain brain cells new abilities.The particles break connections among brain cells.The particles move cells from one part of the brain to another.
- 2. Multiple ChoiceAccording to the article, which of these problems could be caused by exposure to cosmic rays?memory lossshortened limbsdamaged eyesightbruised brain tissue
- 3. Multiple ChoiceAccording to the article, which of these problems could be caused by exposure to cosmic rays?memory lossshortened limbsdamaged eyesightbruised brain tissue
- 4. Multiple Choice"For his team's new study, the scientists beamed mice with high-energy charged particles. The idea was to simulate cosmic rays in space."
What is the most likely meaning of simulate in this excerpt from the passage:increaseimitatespreadprove - 5. Multiple Choice"And this argues that space radiation could impair the ability of astronauts to perform critical tasks, the scientists say"
What does impair most likely mean in this context?harmannoyadvanceintroduce - 6. Multiple ChoicePart A
"There are big differences in the way the animals are exposed to the radiation versus how astronauts are, he points out"
What is most likely the meaning of versus in this context?by way ofin terms ofregardless ofas opposed to - 7. Multiple ChoicePart B
Which word group from the sentence best supports the answer to Part A?big differencesanimals are exposedthe radiationastronauts - 8. Multiple ChoiceWhat is the main difference between the two sections of the texts?The first section describes existing astronaut missions; the second expands on the topic to discuss future missionsThe first section interviews a brain scientist; the second interviews a scientist who works with miceThe first section deals withh experiments on mice; the second explains how people may be affectedThe first section explains the origins of cosmic rays; the second describes in detail how to block them
- 9. Multiple ChoicePart A
According to the article, why might exposure to cosmic rays be especially troublesome for astronauts on a trip to Mars?Cosmic rays are unusually strong on other planetsastronaut training requires long periods in a simulatorthe longer people remain in space, the greater the dangers becomeyounger astronauts may be more sensitive to radiation than their older crewmates - 10. Multiple ChoicePart B
Which sentence best supports the answer to Part A?particles zipping through space could be the wrong stuff for Mars astronauts.The study's authors now worry that astronauts could suffer similar effects on long missions outside Earth's protective atmosphere"We weren't expecting such dramatic effects from these charged particles," says Limoli.Learning more about cosmic rays may help scientists create better ways to protect those astronauts - 11. Multiple ChoiceAccording to the article, what is one result of scientists' concern about how cosmic rays could affect astronauts?scientists have stopped simulating cosmic rays in the laboratoryscientists are exploring ways to protect astronauts in their spacecraftsscientists are applying new knowledge to look for cures for memory lossscientists are insisting that missions do not leave the Earth's orbit for now
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