Physics

5. This time period corresponds to one rotation of the Earth on its axis (page 104)
6. A piece of equipment used for looking at cells (page 1)
7. A substance with high pH (page 52)
9. This type of reaction produces salt and water (page 53)
10. A non-contact force that keeps the planets in orbit around the Sun (page 102)
13. A substance that changes colour depending on pH (page 52)
14. The cell wall is made of this (page 2)
15. A solid being dissolved (page 39)

1. A solution where no solute can be dissolved (page 39)
2. When the nuclei of the egg and sperm join (page 16)
3. The unit of force (page 79)
4. The part of a cell where respiration occurs (page 2)
8. The release of an egg from the ovary (page 16)
11. A contact force that resists movement (page 80)
12. This time period corresponds to the Earth completing one orbit of the Sun (page 104)