Here are some sites that will help you practice and learn more about the skills you need to know in Science. I hope you enjoy them.
1. Plant Parts
2. Life Cycle of Plants
3. Monarch Buterfly Life Cycle
4. Informative site (many themes)
5. Animal Resources
6. National Geographic for Kids
7. The Magic School Bus
8. Cute game for learning the water cycle.
9. Food and agriculture in our lives
10. A little bit of everything
12. The Greenhouse Effect