How to Use "ascertain" with Example Sentences

1. There were favorite colors to ascertain .
2. In galactic collisions like this the outcome can be difficult to ascertain .
3. You should also ascertain early on what risk measures are used to gauge this performance .
4. Scientists have conducted many experiments to ascertain which animals can see in colour - and made some surprising discoveries .
5. Results were initially inconclusive . There were just too many variables to ascertain whether cloud seeding actually weakened a hurricane .