raising chicks set up question

[Mattsiewrt19]

These are my chicks i think there about two weeks old i usually keep them outside during the day then at night i put them in the tank and repeat the process, ttoday there is a breeze but it feels good outside they have the tank to run into to warm up and the bulb is 250 watt

 

[16 paws]

These are my chicks i think there about two weeks old i usually keep them outside during the day then at night i put them in the tank and repeat the process, ttoday there is a breeze but it feels good outside they have the tank to run into to warm up and the bulb is 250 watt

Very cute chicks, what kind are they? What is the tank?
Marie