Vocabulary associated with science & tech - SS1 English Past Questions and Answers - page 1

Conductivity is the ability of a material to allow the flow of electricity. Materials that are good conductors of electricity, such as metals, have free electrons that can move easily. Materials that are poor conductors of electricity, such as insulators, do not have free electrons.

Acids are substances that can donate a hydrogen ion, while bases are substances that can accept a hydrogen ion. Acids have a sour taste, while bases have a bitter taste. Acids can also turn blue litmus paper red, while bases can turn red litmus paper blue.