I am very upset with you two! You know the safety rules of this class and that it is not good to mix chemicals together. Combining chemicals can be very dangerous. these two chemicals create this gas which can be toxic.
Sarah and Josh start mixing chemicals together in science class.
Smoke starts to appear.
Mr. Walker gets angry at Sarah and Josh, he tells them it is bad to mix chemicals together and why.
MARK and HENRY! Clean up the mess you made or you will not go to your next class.
Mark and Henry are working together in the lab doing experiments.
The bell rings! They both leave the lab station leaving a mess behind.
Mark and Henry get stopped by the teacher because they did not clean up their mess after they were finished.