Across
- 6. Plastics are ______.
- 7. People sometimes have ______, but we can think about good ideas.
- 9. The best invention to carry heavy things is the _____.
Down
- 1. Inventors need ______ to have ideas.
- 2. You can use _____, instead of plastic bag.
- 3. You can't throw ______ into the ocean.
- 4. There're three ______ in the ocean.
- 5. Things we need like food and water are our important _____.
- 8. We have lots of way to ______, like running, walking and jumping.