All galaxies are held together by gravity, but based on what we can see (stars, nebulae, etc.) , there shouldn’t be enough gravity to do the job. That is why scientists believe that all galaxies are partially held together by a substance called , which we can’t see.

Some studies have found that what percentage of students have cheated in some form? a. 10% b. 25% c. 45% d. 75%

Question 12 which was not a reason the industrial revolution began in england? a) leading world exporter b) favorable finance institutions c) independent local governments d) large labor force question 14 who did not lead the fight to end slavery? a) william wilberforce b) toussaint l’ouverture c) simón bolívar d) olympe de gouges question 15 which was not an underlying cause of the revolutions of 1830 and 1848 in europe? a) increasing aristocratic discontent b) budding romantic movement c) rising tide of nationalism d) growing liberal spirit

What information does a survey provide? a. an accurate description of the population surveyed b. whether there is a predictive relationship between two variables? c. whether there is a cause-and-effect relationship between two variables d. none