Join forces and pick one!

⭐️	Why does a helium balloon defy gravity?
⭐️	Which planet is the closest one to us?
⭐️⭐️	What would a helium balloon experience if it was let go?
⭐️⭐️	Why is it easier to ride a bike downhill than uphill?
⭐️⭐️⭐️	How does depth affect hydrostatic pressure?
⭐️⭐️⭐️	How do windmills work?
⭐️⭐️⭐️	How do solar panels work?
⭐️⭐️⭐️	How do water power plants work?
⭐️⭐️⭐️	Why do most snowflakes have repeating patterns in 6's?
⭐️⭐️⭐️	Is perpetual motion possible?
⭐️⭐️⭐️	How cold would a popsicle need to be if eating it would consume more energy than eating it would release?
⭐️⭐️⭐️⭐️	Why does the climate on the equator involve a lot of rainfall?
⭐️⭐️⭐️⭐️	How much money do you save in a year if you sweep the floor of your shower area after a shower?
⭐️⭐️⭐️⭐️	By how much would the ocean surface level rise if all polar ice melted?
⭐️⭐️⭐️⭐️	Why do we have annually repeating seasons?
⭐️⭐️⭐️⭐️	Find the rate of change in mass [[$\Delta m$]] of a bunsen burner change relative the rate of change in temperature [[$\Delta T$]] of water heated by it?
⭐️⭐️⭐️⭐️⭐️	How does facial recognition in modern smartphones work?
⭐️⭐️⭐️⭐️⭐️	Considering that it is impossible to exit a black hole after entering it, how is it possible that black holes radiate energy?