What time of year is it most effective to broadcast tornado safety public safety announcements?
spring
fall
summer
winter

I would say summer. The temperatures and the way the weather is are perfect tornado times. It should be all of them though because you want to keep the public safe no matter what time of year it is.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

6because i no yea yea