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Unit 1 Topic Water
| Term | Definition |
|---|---|
| Adhesion | Water molecules stick to other materials |
| Cohesion | Water sticking to other molecules via hydrogen bonds |
| Polar molecule | A compound with one negatively charged side and one positivley charged side |
| Hydrogen bond | The side with the hydrogen atoms (positive charge) attracts the oxygen side (negative charge) of a different water molecule |
| Surface tension | Water has a thin "skin" on its surface due to the water molecules sticking together |
| Specific heat capacity | The amount of heat required to change the tempurature of a unit mass of a givin substance by a unit amount |
| Expansion uopn freezing | As water decereases in temperature, the molecules move away from each other, which causes an increase in volume |
| Universal solvent | Water |
| Capillary action | When cohesion and adhesion work togteher to allow water to travel against gravity and move upo a plant |