Across
- 3. Bubbly substance formed on the surface of liquids.
- 4. A dense plant often found in gardens or wild areas, large but smaller than a tree..
- 7. Unwanted plants that grow among crops or in gardens.
- 8. A stream of water falling from a height.
- 11. A field of grass and wildflowers.
- 12. The regular rise and fall of sea levels.
- 13. A vehicle designed for travel in outer space.
- 16. Plants grown and collected for food or sale.
- 17. A massive system of stars, dust, and gas in space.
Down
- 1. An unidentified flying object, often linked to aliens.
- 2. The process of gathering crops.
- 5. Operated without a person on board.
- 6. A raised area of land, smaller than a mountain.
- 9. A place on the coast where ships can dock safely.
- 10. Wetland area with muddy ground and water-loving plants.
- 12. A small, thin branch from a tree or bush.
- 14. A steep rock face, especially by the sea.
- 15. A plan showing times for tasks or events.