Across
- 3. A curved shape, like that of the moon when it is less than half illuminated
- 5. A name given to Venus when it is visible in the early morning just before the sun rises (don't use a space)
- 7. The toxic chemical in the heat-trapping clouds that cover Venus (don't use a space)
Down
- 1. The different shapes Venus appears to take as it orbits the sun
- 2. The name given to Venus when it is visible just after the sun sets in the sky (don't use a space)
- 4. Molten or melted rock that flows from a volcano
- 6. A device that sends out signals that bounce off the surface of an object and return to the device, revealing information about that object