Question: Fact 1: Nuclear reactions in stars causes stars to produce light. Fact 2: June Summer Triangle Three bright stars light up the summer sky. Given the two facts above, nuclear reactions in stars cause them to brighten up what?
OPTIONS:
- the morning grass
- the elemental waves
- an object
- the summer sky
- hydrogen and oxygen
- Change colors
- the evening tide
- an electron lens
Answer: the summer sky

Question: Fact 1: Blowing air into a whistle causes air to vibrate inside the whistle. Fact 2: Soon the wind blows in fresh air. Given the two facts above, what would wind going through a whistle cause?
OPTIONS:
- vortex
- friction
- vibrant colors
- waves
- Energy.
- kinetic energy
- absence of sound
- vibrations
Answer: vibrations

Question: Fact 1: Contact between rocks over long periods of time causes rocks to smooth. Fact 2: Rocks on the streambed are subrounded and fairly smooth. Given the two facts above, contact between rocks over long periods of time causes rocks to be what?
OPTIONS:
- coiled
- homogenous
- inactive
- subrounded
- dormant state
- barrel-shaped
- erosion
- threatened
Answer:
subrounded