What determines how bright a star appears on earth? a) its size and distance from earth only b) its size, brightness, and distance from earth c) its size and brightness only d) its brightness and distance from earth only

Iam stuck on this question! 45 points : ) how do increases in temperature affect the density of ocean water? answer choices: (a) density does not change (b) density increases (c) density becomes variable (d) density decreases

What is the difference between the formation and characteristics of intrusive igneous rock and extrusive igneous rock?

Which events occurred during the space race? check all that apply. (a) nasa was established. (b) yuri gagarin orbited earth. (c) the soviet union launched salyut. (d) the united states launched skylab. (e) the united states launched explorer 1.