1/10 0 Points 0 Streak Science What is the primary reason that stars twinkle when observed from Earth? The movement of stars Earth's atmosphere Reflection from other planets Variability of starlight Other quizzes Trending, related, and recent quizzes you may be interested Animals & Nature What is the only penguin species found in the Northern Hemisphere? Play Now Technology What is the primary purpose of an SSD in a computer? Play Now Science What part of the human brain controls balance and coordination? Play Now Arts & Literature Who wrote the poem The Road Not Taken, which begins with Two roads diverged in a yellow wood? Play Now Sign up for Quiz Daily! By subscribing to Quiz Daily you are agreeing to our Privacy Policy and Terms of Use. Sign up