A culture tube or sample tube.
A experiment done in a test tube is commonly referred to as an "in vitro" experiment. This type of experiment allows for controlled conditions within the test tube to study biological processes or reactions outside of a living organism.
Observations are made in a test tube.
The liquid collected in a test tube is typically referred to as the "sample" or "solution." It can contain various substances or molecules depending on the experiment or analysis being conducted.
To check if a gas is hydrogen, you can perform the "squeaky pop" test. Collect a small sample of the gas in a test tube and ignite it with a flame; if it produces a squeaky pop sound, it is likely hydrogen gas. Additionally, you can use a flame test in a controlled laboratory setting to see if the gas burns with a pale blue flame, characteristic of hydrogen.
Sometimes you have to smell things in labs. It is very dangerous to stick your nose over a test tube and sniff it so you have to waft it. You do this by holding the test tube or beaker away from you face and wave your hand over it trying to wave the smell towards your nose.
A experiment done in a test tube is commonly referred to as an "in vitro" experiment. This type of experiment allows for controlled conditions within the test tube to study biological processes or reactions outside of a living organism.
Observations are made in a test tube.
putting chemicals in and construing an experiment
I think the test tube rack is used to hold any amount of chemical or liquid during an experiment.
There are no test tubes involved.
A test tube is usually used to contain small amounts of fluids, usually to react or to hold temporarily. It is also used to clearly observe different reacting samples of chemicals in a experiment which usually call for many test tubes. Heating a test tube is done by a water bath, but usually not direct heat. Also, an inverted test tube can be used for gas collection in a gas emitting reaction by water displacement.
Because if the experiment being conducted in the test tube is explosive or very reactive then it can spit out stuff and this can be dangerous to your eyes or skin. so by pointing the test tube away then you won't harm anyone if anything spits out
Never put your face directly over the test tube. Use your hand to fan the air above the test tube toward you and smell that way.
A solvent.
The term "test tube baby" does not refer to a baby that is kept in a test tube - babies are much too large to fit into test tubes, even aside from the fact that there is no reason to put a baby into a test tube. The term refers to the origin of the baby. If a zygote is produced by in vitro fertilization (rather than by sexual intercourse) then if that zygote is implanted in a womb and grows to become a baby, it qualifies as a test tube baby.
throw that thing away!
The liquid collected in a test tube is typically referred to as the "sample" or "solution." It can contain various substances or molecules depending on the experiment or analysis being conducted.