Positive feedback loops:a. cause a response in the same direction as the initial stimulus. b. move the system further and further away from the set point. c. All of the answer options are correct. d. are activated by a stimulus. e. continue until interrupted or broken by an external signal.

he kicked it 10 feet straight up into the air? i think this works.

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.