Skater

1) Why can certain stars sometimes be identified as eclipsing binary stars? Answer) B. They become dimmer at regular intervals 2) Which of the following is a major difference between elliptical galaxies and spiral galaxies Answer) A. Elliptical galaxies h...

I got 3/5 by listening to this dirty bird ^

no one has the answer for question 13.

here are the answer 1.C 2.D 3.C 4.C 5.A 6.D 7.A 8.B 9.D 10.D 11.C 12.D 13.D 14.D 15.C 16.B 17.B 18.C 19.C 20.A

Thanks :)

Really helpful :|