Testing General Relativity: teacher key

Albert Einstein, grade 10 edition, written for 10th grade. The scientist behind general relativity, then how it was checked: the 1919 eclipse, GPS clocks and gravitational waves.

Read the book. Print this page for the key.

Questions and answers

1. Where did the 1919 eclipse expeditions go?
   • Ulm and Munich
   • Principe and Sobral (answer)
   • Mercer Street and Bern
2. Why did GPS engineers have to correct for relativity?
   • To get accurate time on Earth (answer)
   • To make satellites lighter
   • To photograph stars
3. Who found the first proof in 1974 that gravitational waves exist?
   • Michelson and Morley
   • Heisenberg and Hubble
   • Hulse and Taylor (answer)
4. What was Einstein convinced about measuring gravitational waves?
   • That it would be easy
   • That it would never be possible (answer)
   • That it was already done
5. What did general relativity predict more accurately than Newton's theory did?
   • Planetary orbits around the Sun (answer)
   • The age of the Sun
   • The size of the Moon