Across
- 2. A type of scientist who studies outer space
- 5. Renewable energy source derived from the sun
- 6. The process of designing and building structures or machines
- 7. The force that pulls objects toward the Earth
- 8. A tool used to magnify objects too small to be seen with the naked eye
Down
- 1. A person who writes instructions for computers
- 3. The study of numbers, quantities, and shapes
- 4. A branch of science concerned with substances and their interactions
- 9. The basic building block of all living organisms