Q: What kind of radiation is greatest at the equator and lessens toward the poles? A:
OPTIONS:
- lunar raditation
- small radiation
- large radiation
- solar radiation

Answer: solar radiation

Q: The majority of salamanders lack what organs, so respiration occurs through the skin or through external gills? A:
OPTIONS:
- throats
- mouths
- noses
- lungs

Answer: lungs

Q: For most waves, energy is proportional to what, a term that describes the height of the wave? A:
OPTIONS:
- wave frequency
- wave volume
- wave threshold
- wave amplitude

Answer:
wave amplitude