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Англійська мова(edisk_files) / Кузьмина И

6. Agree or disagree with the statements given below.

  • What is the world made of?

  • What holds it together?”

  • Democritus (460-370 B.C.)

  • People have asked these questions for thousands of years. But only recently has a clear picture of the “building blocks” of our universe been developed. The scientists who have developed this picture work in an exciting and challenging field called high-energy particle physics. Their discoveries are summarized in the chart, Standard Model of Fundamental Particles and Interactions.

  • How much do you know about the latest theories and research on these ancient questions? Indicate whether you agree or disagree with the statements.

  • 1. There are subatomic particles that have no mass and no electric charge.

  • 2. Some particles can travel through billions of miles of matter without being stopped (interacting).

  • 3. Antimatter is science fiction and not science fact.

  • 4. Particle accelerators are used for cancer treatment.

  • 5. The smallest components of the nucleus of an atom are protons and electrons. 6. Particles and antiparticles can materialize out of energy.

  • 7. Particle physicists need larger accelerators in order to investigate larger objects.

  • 8. Magnets are used in circular accelerators to make the particles move faster.

  • 9. Work done by particle physicists at accelerators is helping us understand the very early development of the universe.

  • 10. Gravity is the strongest of the fundamental forces of nature.

  • 11. There are at least one hundred different subatomic particles.

  • 12. All known matter is made of leptons and quarks.

  • 13. The protons in the Large Hadron Collider (LHC) at the CERN lab in Geneva, Switzerland will cross the French-Swiss border 11,000 times each second (without a passport), when LHC is completed in 2007.

  • 14. Friction is one of the fundamental forces of nature.

  • 15. The world's largest magnet (which is at a particle physics lab) weighs half has much as the Eiffel Tower.

  • 16. Many of the physicists who will run the particle physics experiments now under construction are still students in high school.

  • What is the world made of?

  • What holds it together?”

  • Murray Gell-Mann (b. 1929)