What is true about scientific idea? it is biased in its results it asks about an opinion it asks about moral value it can be observed and tested

During a hot day, warm and moist air rises and cools in the atmosphere. which even would occur next on such a day? a. condensed droplets would gather to become water vapor. b. water vapor would condense into tiny droplets. c. water droplets would evaporate to form rain and snow.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Can someone i have no idea of how to do this.