*Question*
Q: What are the three main types of rocks? Choices: - limestone , igneous and metamorphic - plutonic, igneous and metmorphic - crystalline , igneous and metamorphic - sedimentary, igneous and metamorphic A:
**Answer**
sedimentary, igneous and metamorphic

*Question*
Q: What hormone, which is associated with luteinizing hormone and male sexuality, helps bring about physical changes in puberty? Choices: - steroids - epinephrine - estrogen - testosterone A:
**Answer**
testosterone

*Question*
Q: How do all musical instruments create sound? Choices: - condensation - stimulation - conduction - vibration A:
**Answer**
vibration

*Question*
Q: What are the high points of a transverse wave called? Choices: - peaks - troughs - ridges - crests A:
**Answer**
crests