Across
- 3. The smallest unit of an element
- 5. The nervous system is made of specialised cells called
- 7. The amount of substance in an object
- 8. system Brain is part of the which organ system
- 9. Anything that takes up space and has mass
Down
- 1. A gas given off by plants during photosynthesis
- 2. Long bones are filled with a soft material called
- 4. The coloured part of the eye
- 6. The solar system revolves around the
- 10. Muscles are attached to bones by these tissues