The color of a star is primarily determined by its composition size apparent brightness age surface temperature

The correct

The color of a star is primarily determined by its Surface temperature.

The explanation:

-Stars emit colors of many different wavelengths, but the wavelength of light where a star's emission is concentrated is related to the star's temperature - the hotter the star, the bluer it is; the cooler the star, the redder it is.

The surface temperature is used to estimate the wavelength that radiated within. the star with lower wavelength tends to have purple-ish color, while the one with higher wavelength tends to have orange-ish color.

For example, the really hot stars, called White Dwarf stars, have a white surface temperature, while a cooler star would have a more red color.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​

truck y has a greater velocity than truck x.