Holly, the upside to this question is, yes there is most certainly life after death.
The downside is, it will be unlikely to have any connection or bear relation to the one we experience now.
Like all living things, we are comprised of both energy and matter. Energy and Matter are industructable, they can be converted or changed into something else, they can never be destroyed.
Now
Matter, our bodies in this case, thats easy. Whether buried, cremated or whatever, the matter which makes up your body will remain. At some point in a far future age it will most likely end up in a star to be reused again, it will return back to where it came from.
In fact the matter which comprises your body at this moment in time, could have been part of a myriad other forms before, you are just it's latest incarnation.
Energy Now thats a bit more difficult to explain, unlike matter, energy doesn't have substance in the way we know. Nevertheless it is real, our minds are the product of energy pulsing through our bodies and when our bodies die, that energy is released. A small part remains within the atoms of our matter, the rest is released and thats where things could become theological.
That energy might just dissipate into the universe to become part of the energy which makes it up, or the energy which in part is who we are, our mind, our thoughts, our memories might remain , either way our existence will be as far removed from this one as a single celled amoeba is from us today.
Something people might take some hope from, there are infinite possibilities for the energy we are today, when it leaves the confines of this body.