Inventors and inventions B

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Across
  1. 5. Tesla Inc. is a company that __________ (not develops)electric cars.
  2. 6. Marie Curie __________ radium.
  3. 7. A healthy human baby ___________ 3 kilos.
  4. 8. ____________ is sed to make beds and sofas.
Down
  1. 1. It takes a long time to ___________ a new product that people want to buy.
  2. 2. ____________ is a way of doing something.
  3. 3. NASA is __________ tests on a new spaceship to make sure it's safe to use in future space missions.
  4. 4. We use different kinds of ____________ for all the things we make.