*Question*
Fact 1: All life relies on a relatively narrow range of pH, or acidity.  Fact 2: Acids have low pH's.  Given the two facts above, answer the question "All life relies on a relatively narrow range of what?" with the following options:  - voltage  - Energy  - sun's heat  - low pHs  - Decibels  - spectrum  - Light  - sunlight
**Answer**
low pHs

*Question*
Fact 1: Caecilians can be found in moist soil near rivers and streams in tropical regions.  Fact 2: Caecilians are primitive amphibians that resemble earthworms.  Given the two facts above, answer the question "Where can tropical animals that resemble earthworms be found?" with the following options:  - dry conditions  - our planet  - floor  - storing water  - less water  - moist soil  - dry soil  - jungle
**Answer**
moist soil

*Question*
Fact 1: Faulting of rock in Earth 's crust causes earthquakes.  Fact 2: Earthquakes can cause a tsunami.  Given the two facts above, answer the question "Tsunamis are often cause by what in the earth's crust?" with the following options:  - waves  - faulting.  - flooding  - pressure  - friction  - Movement  - erosion  - heat
**Answer**
faulting.

*Question*
Fact 1: Intense heat has a negative impact on an organism.  Fact 2: Plants and animals are organisms.  Given the two facts above, answer the question "what does intense heat have a negative impact on?" with the following options:  - the sun  - h2o  - plants  - Bacteria  - cells  - humans  - fire  - animals
**Answer**
