*Question*
Q: Reducing the number of molecules in a rigid container causes what to decrease? Choices: - velocity - demand - energy - pressure A:
**Answer**
pressure

*Question*
Q: What is the "a" horizon commonly known as? Choices: - sediment - core - crust - topsoil A:
**Answer**
topsoil

*Question*
Q: What is in the soil that causes mars to look red? Choices: - carbon - garnet - sand - iron A:
**Answer**
iron

*Question*
Q: What kind of process occurs without the need for a continual input of energy from some external source? Choices: - Decay Process - Different Process - induced process - spontaneous process A:
**Answer**
spontaneous process