Step dad problems. Please help.?

Today my step father yelled at me over a merit badge project i am doing for boy scouts. First of all it was, only a segment of the merit badge requirements and he didn't even read what the requirement was. I did it accordingly but he still insists that i did it wrong, WITHOUT EVEN LOOKING AT WHAT THE REQUIREMENT WAS! He yelled at me for a pretty long time and started saying stuff like, "I could get you up at eight o'clock in the morning and make you work all damn day!" and "You're going to have to start buying your own damn food and clothes! When school comes around you're gonna be buying anything that you wanna wear!". I never tried to provoke any of this, when i showed him my project and told him to read it (which i probably should have asked him to read it.) he flung it away and said "Don't ever throw **** at my face again." I didn't even throw it at his face, i put it on the counter in front of him. I did slam it down but it was at least two feet away from him. I've never really had problems with him before, as long as i stay quiet and do what he says i'm ok. Maybe it was the fact that he's never been so aggressive towards me that made me so comfortable doing what i did. Needless to say though, it scared the **** out of me. Luckily my mom came when she did because it was just getting worse and worse. I've always done what he said because he puts clothes on my back and food on the table, but now he's threatening to deprive me of that. I don't know what to do at this point. I never liked being in boy scouts anyway so i might try and convince my mom to let me quit. If i had never tried to do this merit badge none of this would have happened. I went ahead and burned the packet in my room with a lighter that my biological dad gave me. I see him every now and then during the summer but i don't know him well enough to ask if i can move in. Please tell me what i should do to make this better, as far as i know he's still pretty angry at me.