Atticus tries to make Jem leave the jail and go home during the confrontation with the angry mob to ensure Jem's safety. He wants to protect Jem from any potential danger or violence that could occur.
Because its the first time they have seen snow and Jem doesn't want Scout to ruin it by leaving lots of footprints in it.
Jem didn't want to take the ball of twine into the Radley yard because he didn't want to make Boo Radley feel like they were taunting him or invading his privacy further. Jem was also afraid of getting in trouble with their father, Atticus, if he found out they were trespassing on the Radley property.
Jem wanted to retrieve his pants before morning came because he didn't want to get in trouble with Atticus. He didn't want Atticus to know what they were doing, which was looking into Radley's window.
Jem thinks that Atticus is calling them to come inside for the night, as he does not want them to stay out late and get into trouble. Jem also respects Atticus's authority and knows that they should listen to him.
BOO RADLEY
a note asking him to come out
Jem touches the house, because Dill dares him to. And Jem doesn't want to be a coward, so he does it to prove to Dill that he is not afraid.because he was dares by Dill to touch it. Since Jem always takes dares, he did it.
Aunt Alexandra
Mr.Ewell's said, "One down two more to go," and Jem told Scout if she told Atticus then he would never speak to her again. Jem was copying how his father reacted when Bob Ewell spat at him - by not reacting at all. Also he didn't want Scout to tell Atticus because he didn't want his father to become angry or to realise that Scout was scared of Bob Ewell. They also didn't want to scare Atticus with his comments, and Jem thought that they were probably just empty threats.
Jem uses earth and snow to make their snowman.
Jem's idea was to make a snowman out of dirt and cover it with snow to make it look like a snowman.