Scientific Investigations help?

Question

beccaboo333 · Answer

what exactly do you need help with?

anonymous · Answer

Omar wants to find a simple test that he can use to identify certain gases. Omar wants to be able to identify oxygen, hydrogen, and carbon dioxide. He decides to use a splint of flaming wood to perform his experiment. Omar places the splint of wood into a sealed chamber. He then watches what occurs as he pumps one of his three gases into the chamber. 

Which of the following is the independent variable in Omar's experiment?

anonymous · Answer

the air pressure in the chamber
the type of gas used
the temperature of the chamber
the type of wood used

anonymous · Answer

@beccaboo333

beccaboo333 · Answer

well it doesnt talk about the temperature. there isnt a specific gas said thats used. and okay it talks about the wood. but thats not the independent variable.

anonymous · Answer

so that leaves the air pressure in the chamber?
 @beccaboo333

anonymous · Answer

Nevermind its the type of gas used, thanks though.

beccaboo333 · Answer

okay.

beccaboo333 · Answer

close questions when they've been answered or you figured it out