1997 Geo Prizm grinding

Jack the car up (use jackstands) and check the inner and outer CV boots for cuts, tears and grease thrown around.
This is usually how CV joints fail, the boots (loaded with grease) get torn by road debris, the lubricant comes out and the joint grinds metal to metal.
Usually a clicking, grinding noise (especially when turning) starts. The CV joint will then have to be replaced.

If you have no signs of a lubricant leak on the CV joints, raise the car and grab the wheel checking for lateral or vertical movement which would indicate a wheel bearing, ball joint or tie rod end.

Also check the brake rotor (warped) and the caliper (looseness).