Q: What are the three types of rocks? Choices: - igneous, sedimentary, mixed - igneous, orbital, metamorphic - opaque , sedimentary , metamorphic - igneous, sedimentary, metamorphic A:
igneous, sedimentary, metamorphic

Q: What forms when water vapor condenses around particles in the air? Choices: - wind - storms - humididty - clouds A:
clouds

Q: What are electrons in the outer energy level of an atom called? Choices: - shell electrons - outer electrons - positive electrons - valence electrons A:
valence electrons

Q: What is heard when sound waves bounce back from a surface that they can't pass through? Choices: - radio - ultrasound - loop - echo A:
echo