4. What is the main difference between a refracting telescope and a reflecting telescope? A refracting telescope uses a concave lens to collect light; a reflecting telescope uses a concave mirror to collect light.
A refracting telescope uses a convex lens to collect light; a reflecting telescope uses a concave mirror to collect light.
A refracting telescope uses a convex lens to collect light; a reflecting telescope uses a convex mirror to collect light.

i would think klcio3

force tends to be low and long diustance masses are high

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.