Across
- 3. The name given to Venus when it is visible just after the sun sets in the sky.
- 5. 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.
- 7. The different shapes Venus appears to take as it orbits the sun.
Down
- 1. A curved shape, like that of the moon when it is less than half illuminated.
- 2. A name given to Venus when it is visible in the early morning just before the sun rises.
- 4. The toxic chemical in the heat-trapping clouds that cover Venus.