Across
- 4. Energy that comes from a source and travels through space at the speed of light.
- 6. enhanced ... effect
- 8. The base level for measuring elevation and depth on Earth.
- 10. The act or force of one thing hitting another
Down
- 1. The whole mass of air that surrounds the Earth
- 2. A chemical element with the symbol C and atomic number 6.
- 3. Move steadily and continuously in a current or stream.
- 5. economic activity concerned with the processing of raw materials and manufacture of goods in factories.
- 7. The production and discharge of something, especially gas or radiation.
- 9. Having no living members; no longer in existence.