Good Riddles

Question: What does a calf become after it's 1 year old?

Question: What do you call a bruise on a T-Rex?

Question: What is the difference between a locomotive engineer and a teacher?

Question: What did the calculator say to the Math student?

Question: you have two liquid substances in a sealed jar one yellow one white, they stay separate even when shaken. When poured out the white substance turns clear what am i?