A scientist wants to predict the next time there three comets will be at perihelion, the point in an object's orbit at which it is closest to the sun. Write one letter in each box to correctly complete the table. A. 2020
B. 2022
C. 2033
D. 2039

Comet name:
Encke
Wild 2
Crommelin

Semimajor axis of orbit (AU):
2.21
3.44
9.2

Last reached perihelion:
Mar-17
Jul-18
Aug-11

Next time it will reach perihelion:
(A, B, C, or D)
(A, B, C, or D)
(A, B, C, or D)

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

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.