A hydrogen atom lost its electron and went to the police station to file a missing electron report. He was questioned by the police: "Haven't you just misplaced it somewhere? Are you sure that your electron is really lost?"
"I'm positive." replied the atom.
The teacher of the earth science class was lecturing on map reading.
After explaining about latitude, longitude, degrees and minutes the teacher asked, "Suppose I asked you to meet me for lunch at 23 degrees, 4 minutes north latitude and 45 degrees, 15 minutes east longitude?"
After a confused silence, a voice volunteered, "I guess you'd be eating alone."
Don't LOOK at anything in a physics lab.
Don't TASTE anything in a chemistry lab.
Don't SMELL anything in a biology lab.
Don't TOUCH anything in a medical lab.
and, most importantly:
Don't LISTEN to anything in a philosophy department.
You enter the laboratory and see an experiment. How will you know which class is it?
If it's green and wiggles, it's biology.
If it stinks, it's chemistry.
If it doesn't work, it's physics.
Chemist's last words
1) And now the tasting test ...
2) And now shake it a bit ...
3) In which glass was my mineral water?
4) Why does that stuff burn with a green flame?!?
5) And now the detonating gas problem.
6) This is a completely safe experimental setup.
7) Now you can take the protection window away ...
8) Where do all those holes in my kettle come from?
9) And now a cigarette ...