Across
- 1. A field of science that deals with space, universe, and celestial objects.
- 5. A branch of mathematics that uses letters as symbols to represent unknown values to solve mathematic problems.
- 6. A field of science that studies places, lands, and environments.
Down
- 2. An old device that indicates time by the position of the shadow of an object.
- 3. Someone who is a specialist in mathematics.
- 4. A set of rules to be followed to solve a problem.