Spiral, elliptical, irregular, and barred spiral are descriptions of different shapes of . A.
orbits
B.
solar systems
C.
galaxies
D.
stars

How will the system respond to a temperature increase?

Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost

Ne way in which elements differ from each other is the structure of the electron cloud in each element's atoms. in an electron cloud, an electron that is farther away from the nucleus has