Science Homework Help

Hello there, I need help answering my questions. Read the prompt below.

The work will have 50 min time limit. The clock counts down continuously once click it to open. There are 20 multiple-choice questions. The questions are displayed one at a time without allowing backtracking. Thus, make sure to advance to the next question after completing and submitting the present question. You CAN’T go back to the question that has already been submitted. The work will start at 9:00 am California time. I need you to be ready at least 30 minutes before nine o’clock so I’ll meet you around 8:30 am.