*Question*
Q: The presence of what makes soil hold together more tightly and enables it to hold more water? Choices: - sand - salt - glass - clay A:
**Answer**
clay

*Question*
Q: What type of electrons are electrons that are not confined to the bond between two atoms? Choices: - virtualized - detached - internalized - delocalized A:
**Answer**
delocalized

*Question*
Q: What are solutions that maintain a relatively constant ph when an acid or a base is added? Choices: - gases - water - liquids - buffer A:
**Answer**
buffer

*Question*
Q: Melting ice cubes and freezing water are examples of change of what? Choices: - volume - role - role - state A:
**Answer**
state