That's all about science

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Across
  1. 3. to show or be a sign of something
  2. 5. the force that causes something to fall to the ground or to be attracted to another (гравитация)
  3. 7. someone who studies or teaches mathematics, or is a specialist in mathematics
Down
  1. 1. to say that something will happen, before it happens
  2. 2. someone who studies science or works in science
  3. 4. to have something inside
  4. 6. a rule that people in a particular country or area must obey\follow
  5. 7. the process of moving or the way that someone or something moves