On a timer!
what do scientists know about the future of the universe? check all that apply.

that dark matter exists

what dark matter is made of

why the expansion of the universe is accelerating

that invisible matter must be influencing the rotation of galaxies

that galaxies spin faster than they should based on visible matter

The correct statements are that dark matter exists, and that invisible matter must be influencing the rotation of the galaxies.

Explanation:

The prevalence of dark matter, that is, the invisible matter is usually accepted and it is considered that this matter is approximately 85 percent of the entire matter present in the universe and it comprises undiscovered subatomic particles.  

The dark matter also plays an essential role in illustrating why the galaxies can spin without getting themselves torn apart.  

i'm thinking 600 feet deep in one of the finger lakes.