Across
- 3. a force that pulls bodies towards one another
- 4. when the sea level rises and falls
- 6. the body that pulls on Earth
- 8. Some migratory birds spend the summer in Australia and New __________
- 9. Some migratory birds do this on the Korean mudflats.
Down
- 1. When the sea level rises, we say the tide is _____
- 2. when birds fly from one part of the world to another
- 5. When the tide comes in, the mud ____________
- 6. a wide, flat area along the coast
- 7. South Korea has important mudflats on the _____ coast